Re: Last established connection timestamp by a specific user
Unfortunately not with the standard configuration. You're best bet going forward would be to look at MySQL Enterprise Audit - https://www.mysql.com/products/enterprise/audit.html On Tue, Oct 10, 2017 at 3:54 PM, Gone, Sajan <sg...@lb.com> wrote: > Hi, > >We have a MySQL instance which is currently running on version > `5.7.11-enterprise-commercial-advanced-log`. On this instance I am > trying to figure out the most recent timestamp at which a specific user has > established a connection to this instance (or) performed any DML operations > which might have changed the status of the database. > > Is there any way I can get such information from the > information_schema/performance_schema > tables (or) from any of the mysql logs? > > Thank You, > Sajan Gone > Database Administrator. > > > > Notice: This communication may contain privileged and/or confidential > information. If you are not the intended recipient, please notify the > sender by email, and immediately delete the message and any attachments > without copying or disclosing them. LB may, for any reason, intercept, > access, use, and disclose any information that is communicated by or > through, or which is stored on, its networks, applications, services, and > devices. >
Last established connection timestamp by a specific user
Hi, We have a MySQL instance which is currently running on version `5.7.11-enterprise-commercial-advanced-log`. On this instance I am trying to figure out the most recent timestamp at which a specific user has established a connection to this instance (or) performed any DML operations which might have changed the status of the database. Is there any way I can get such information from the information_schema/performance_schema tables (or) from any of the mysql logs? Thank You, Sajan Gone Database Administrator. Notice: This communication may contain privileged and/or confidential information. If you are not the intended recipient, please notify the sender by email, and immediately delete the message and any attachments without copying or disclosing them. LB may, for any reason, intercept, access, use, and disclose any information that is communicated by or through, or which is stored on, its networks, applications, services, and devices.
Re: Lost Connection Upon Loading Dump
On 4/21/2016 10:51, Stephen R Guglielmo wrote: Hello, I have a empty db that I'm trying to load a .sql file (created via mysqldump) into. The dump has 791611 lines and is 807 MB. Loading the dump is consistently failing at line 1763. Line 1763 is an INSERT statement. The line is 95610 characters long. The error is: ERROR 2013 (HY000) at line 1763: Lost connection to MySQL server during query About 40 tables are restored correctly from the dump prior to it failing at this line. Based on advice from posts I've found on the internet, I've added the follow settings to my.cnf net_read_timeout=60 # 16 MB max_allowed_packet=16777216 I added these to both the [mysqld] and [mysqld_safe] sections to be sure. I restarted mysqld, but still get the same error upon loading the dump. I'm not seeing anything in my error log (do I need to enable more verbose error logging?). MySQL Ver 14.12 Distrib 5.0.95, for redhat-linux-gnu (x86_64) using readline 5.1 I would appreciate any advice on figuring this out. Slow: change the mysqldump params to turn off multiple inserts per statement, and run the dump again. Faster: grow the mysqldump net_buffer_length setting, and the mysqld setting of the same name, to accommodate the largest multiple insert. You may also have to grow max_allowed_packet. PB - Thanks, Steve -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Lost Connection Upon Loading Dump
Hello, I have a empty db that I'm trying to load a .sql file (created via mysqldump) into. The dump has 791611 lines and is 807 MB. Loading the dump is consistently failing at line 1763. Line 1763 is an INSERT statement. The line is 95610 characters long. The error is: ERROR 2013 (HY000) at line 1763: Lost connection to MySQL server during query About 40 tables are restored correctly from the dump prior to it failing at this line. Based on advice from posts I've found on the internet, I've added the follow settings to my.cnf net_read_timeout=60 # 16 MB max_allowed_packet=16777216 I added these to both the [mysqld] and [mysqld_safe] sections to be sure. I restarted mysqld, but still get the same error upon loading the dump. I'm not seeing anything in my error log (do I need to enable more verbose error logging?). MySQL Ver 14.12 Distrib 5.0.95, for redhat-linux-gnu (x86_64) using readline 5.1 I would appreciate any advice on figuring this out. Thanks, Steve -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: ERROR 2013 (HY000): Lost connection to MySQL server during query
2014/1/7 h...@tbbs.net 2014/01/06 17:07 +0100, Reindl Harald what about look in the servers logfiles most likely max_allowed_packet laughable low Is this then, too, likly when the server and the client are the same machine? I left this out, that it only then happens when the client has been idle, and right afterwards the client repeats the request and all goes well. The message is no more than an irritatind break between request and fulfillment. Hello, That happens when you're trying to re-use an existing connection which wasn't properly closed and as you said, it's been idle. When you repeat the operation, the thread is created again and thus everything goes normal. Review the following variables wait_timeout net_write_timeout net_read_timeout Manu
Re: ERROR 2013 (HY000): Lost connection to MySQL server during query
2014/01/06 17:07 +0100, Reindl Harald what about look in the servers logfiles most likely max_allowed_packet laughable low Is this then, too, likly when the server and the client are the same machine? I left this out, that it only then happens when the client has been idle, and right afterwards the client repeats the request and all goes well. The message is no more than an irritatind break between request and fulfillment. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
ERROR 2013 (HY000): Lost connection to MySQL server during query
Now that I installed 5.6.14 on our Vista machine, when using mysql I often see that error-message, which under 5.5.8 I never saw. What is going on? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: ERROR 2013 (HY000): Lost connection to MySQL server during query
Am 06.01.2014 15:36, schrieb h...@tbbs.net: Now that I installed 5.6.14 on our Vista machine, when using mysql I often see that error-message, which under 5.5.8 I never saw. What is going on? what about look in the servers logfiles most likely max_allowed_packet laughable low signature.asc Description: OpenPGP digital signature
Lost connection to MySQL server - need help.
Hello, I got a strange problem related to a production server. It has been working OK for months, but yesterday it start to fail. There are several batch scripts using the database in addition to a web application using it. The php scripts running in batch mode began to get: mysql_connect(): Lost connection to MySQL server at 'reading initial communication packet', system error: 111 I stopped the server and restarted it and everything seems to work OK for hours but when the load start to increase, the errors begin to appear again. Today I noticed that after I starte phpMyAdmin and selected one of the databases, phpMyAdmin was hanging and the batch scripts began to fail again. Seems like the server does not handle much load anymore. What's strange is the memory usage. The server is a quad core cpu with 48 Gb memory, where 28 Gb is allocated to innodb (we mostly use innodb). But when using top command, I noticed this: VIRT: 33.9g RES: 9.4g SWAP: 23g at this time over 11G memory is free. vm.swappiness is set to 0. I find it strange that the server is not able to use physical memory but use swap instead. The amount of cpu time used for swapping is rather high during sql queries. The amount of RESident memory may increase slowly over time but very slowly (it can take hours before it increase to 20+ Gb). [PS: I also got a MySQL server running at a dedicated host at home, where the it seem to use the memory as I except it to use: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ SWAP DATA COMMAND 1462 mysql 20 0 30.0g 27g 3900 S 0.3 87.3 2633:14 844m 29g mysqld ] I would like to have some suggestions what I can do to solve this problem. I have google'd it but found nothing that seem to solve my case. Server: OS: Debian 6 MySQL: 5.1.61-0+squeeze1 my.cnf: # # The MySQL database server configuration file. # [client] port= 3306 socket = /var/run/mysqld/mysqld.sock # Here is entries for some specific programs # The following values assume you have at least 32M ram # This was formally known as [safe_mysqld]. [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice= 0 [mysqld] # # * Basic Settings # user= mysql pid-file= /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port= 3306 basedir = /usr datadir = /database/mysql tmpdir = /tmp language= /usr/share/mysql/english skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address= 127.0.0.1 ## All applications use 127.0.0.1 when connectiong to the db. # # * Fine Tuning # #key_buffer = 16M max_allowed_packet = 64M thread_stack= 192K #thread_cache_size = 8 # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP # # * Query Cache Configuration # query_cache_limit = 1M # # The following can be used as easy to replay backup logs or for replication. # note: if you are setting up a replication slave, see README.Debian about # other settings you may need to change. #server-id = 1 #log_bin= /var/log/mysql/mysql-bin.log expire_logs_days= 10 max_binlog_size = 100M #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name # # * InnoDB # # InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/. # Read the manual for more InnoDB related options. There are many! thread_cache_size = 192 table_cache = 768 ## key_buffer = 64M ## sort_buffer_size = 256K ## read_buffer_size = 256K ## read_rnd_buffer_size = 256K tmp_table_size=32M max_heap_table_size=32M query_cache_size=128M query_cache_type=2 innodb_open_files=1000 innodb_buffer_pool_size = 28G innodb_additional_mem_pool_size = 8M innodb_flush_log_at_trx_commit = 1 innodb_support_xa = 0 innodb_lock_wait_timeout = 50 ## innodb_flush_method=O_DIRECT innodb_log_files_in_group = 2 ## innodb_log_file_size = 128M innodb_log_buffer_size = 8M innodb_thread_concurrency = 14 innodb_file_per_table max_connections = 100 binlog_cache_size = 1M sort_buffer_size= 16M join_buffer_size= 16M ft_min_word_len = 1 ft_max_word_len = 84 ft_stopword_file= '' default_table_type = InnoDB key_buffer = 2G read_buffer_size= 2M read_rnd_buffer_size= 16M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 10G myisam_max_extra_sort_file_size = 10G myisam_repair_threads = 1 myisam_recover [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] #no-auto-rehash # faster start of mysql but no tab
Re: Lost connection to MySQL server - need help.
You might want to comment bind-address= 127.0.0.1 in your my.cnf and restart mysql server. On 12/10/13 10:49, Jørn Dahl-Stamnes wrote: Hello, I got a strange problem related to a production server. It has been working OK for months, but yesterday it start to fail. There are several batch scripts using the database in addition to a web application using it. The php scripts running in batch mode began to get: mysql_connect(): Lost connection to MySQL server at 'reading initial communication packet', system error: 111 I stopped the server and restarted it and everything seems to work OK for hours but when the load start to increase, the errors begin to appear again. Today I noticed that after I starte phpMyAdmin and selected one of the databases, phpMyAdmin was hanging and the batch scripts began to fail again. Seems like the server does not handle much load anymore. What's strange is the memory usage. The server is a quad core cpu with 48 Gb memory, where 28 Gb is allocated to innodb (we mostly use innodb). But when using top command, I noticed this: VIRT: 33.9g RES: 9.4g SWAP: 23g at this time over 11G memory is free. vm.swappiness is set to 0. I find it strange that the server is not able to use physical memory but use swap instead. The amount of cpu time used for swapping is rather high during sql queries. The amount of RESident memory may increase slowly over time but very slowly (it can take hours before it increase to 20+ Gb). [PS: I also got a MySQL server running at a dedicated host at home, where the it seem to use the memory as I except it to use: PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ SWAP DATA COMMAND 1462 mysql 20 0 30.0g 27g 3900 S 0.3 87.3 2633:14 844m 29g mysqld ] I would like to have some suggestions what I can do to solve this problem. I have google'd it but found nothing that seem to solve my case. Server: OS: Debian 6 MySQL: 5.1.61-0+squeeze1 my.cnf: # # The MySQL database server configuration file. # [client] port= 3306 socket = /var/run/mysqld/mysqld.sock # Here is entries for some specific programs # The following values assume you have at least 32M ram # This was formally known as [safe_mysqld]. [mysqld_safe] socket = /var/run/mysqld/mysqld.sock nice= 0 [mysqld] # # * Basic Settings # user= mysql pid-file= /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port= 3306 basedir = /usr datadir = /database/mysql tmpdir = /tmp language= /usr/share/mysql/english skip-external-locking # # Instead of skip-networking the default is now to listen only on # localhost which is more compatible and is not less secure. bind-address= 127.0.0.1 ## All applications use 127.0.0.1 when connectiong to the db. # # * Fine Tuning # #key_buffer = 16M max_allowed_packet = 64M thread_stack= 192K #thread_cache_size = 8 # This replaces the startup script and checks MyISAM tables if needed # the first time they are touched myisam-recover = BACKUP # # * Query Cache Configuration # query_cache_limit = 1M # # The following can be used as easy to replay backup logs or for replication. # note: if you are setting up a replication slave, see README.Debian about # other settings you may need to change. #server-id = 1 #log_bin= /var/log/mysql/mysql-bin.log expire_logs_days= 10 max_binlog_size = 100M #binlog_do_db = include_database_name #binlog_ignore_db = include_database_name # # * InnoDB # # InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/. # Read the manual for more InnoDB related options. There are many! thread_cache_size = 192 table_cache = 768 ## key_buffer = 64M ## sort_buffer_size = 256K ## read_buffer_size = 256K ## read_rnd_buffer_size = 256K tmp_table_size=32M max_heap_table_size=32M query_cache_size=128M query_cache_type=2 innodb_open_files=1000 innodb_buffer_pool_size = 28G innodb_additional_mem_pool_size = 8M innodb_flush_log_at_trx_commit = 1 innodb_support_xa = 0 innodb_lock_wait_timeout = 50 ## innodb_flush_method=O_DIRECT innodb_log_files_in_group = 2 ## innodb_log_file_size = 128M innodb_log_buffer_size = 8M innodb_thread_concurrency = 14 innodb_file_per_table max_connections = 100 binlog_cache_size = 1M sort_buffer_size= 16M join_buffer_size= 16M ft_min_word_len = 1 ft_max_word_len = 84 ft_stopword_file= '' default_table_type = InnoDB key_buffer = 2G read_buffer_size= 2M read_rnd_buffer_size= 16M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 10G myisam_max_extra_sort_file_size = 10G myisam_repair_threads
Re: Lost connection to MySQL server - need help.
11:53:33 cebycny mysqld: Connection ID (thread ID): 92 Oct 12 11:53:33 cebycny mysqld: Status: NOT_KILLED Oct 12 11:53:33 cebycny mysqld: Oct 12 11:53:33 cebycny mysqld: The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains Oct 12 11:53:33 cebycny mysqld: information that should help you find out what is causing the crash. Oct 12 11:53:33 cebycny mysqld_safe: Number of processes running now: 0 Oct 12 11:53:33 cebycny mysqld_safe: mysqld restarted -- Jørn Dahl-Stamnes homepage: http://photo.dahl-stamnes.net/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Lost connection to MySQL server - need help.
:33 cebycny mysqld: Oct 12 11:53:33 cebycny mysqld: Trying to get some variables. Oct 12 11:53:33 cebycny mysqld: Some pointers may be invalid and cause the dump to abort. Oct 12 11:53:33 cebycny mysqld: Query (7f7f1c0dcbc0): SHOW CREATE TABLE `calculation` Oct 12 11:53:33 cebycny mysqld: Connection ID (thread ID): 92 Oct 12 11:53:33 cebycny mysqld: Status: NOT_KILLED Oct 12 11:53:33 cebycny mysqld: Oct 12 11:53:33 cebycny mysqld: The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains Oct 12 11:53:33 cebycny mysqld: information that should help you find out what is causing the crash. Oct 12 11:53:33 cebycny mysqld_safe: Number of processes running now: 0 Oct 12 11:53:33 cebycny mysqld_safe: mysqld restarted -- Jørn Dahl-Stamnes homepage: http://photo.dahl-stamnes.net/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Lost connection to MySQL server - need help.
On Saturday 12 October 2013 13:07, Andrew Moore wrote: Could be a crash related to innodb data dictionary being out of sync. Could be a bug. Seems like a bug yes. However, we had a strange situation yesterday when we had several processes in the state copying to tmp table (if i remember the exact phrase). After witing 2 seconds, I restarted the server. It seemed to work OK until the backup started. Perhaps we should restore the database that I suspect cause this, in order to rebuild the complete database. -- Jørn Dahl-Stamnes homepage: http://photo.dahl-stamnes.net/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Lost connection to MySQL server - need help.
Am 12.10.2013 17:02, schrieb Jørn Dahl-Stamnes: On Saturday 12 October 2013 13:07, Andrew Moore wrote: Could be a crash related to innodb data dictionary being out of sync. Could be a bug. Seems like a bug yes. However, we had a strange situation yesterday when we had several processes in the state copying to tmp table (if i remember the exact phrase). After witing 2 seconds, I restarted the server. It seemed to work OK until the backup started so someone did optimize table on a large table you do yourself not a favour restarting the server in such a moment signature.asc Description: OpenPGP digital signature
Re: Lost connection to MySQL server - need help.
On Saturday 12 October 2013 17:36, Reindl Harald wrote: so someone did optimize table on a large table you do yourself not a favour restarting the server in such a moment 7 hours before the server was shut down, we did a alter table to add a primary key to a table that is read-only from the web application. -- Jørn Dahl-Stamnes homepage: http://photo.dahl-stamnes.net/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Lost connection to MySQL server - need help.
Am 12.10.2013 19:45, schrieb Jørn Dahl-Stamnes: On Saturday 12 October 2013 17:36, Reindl Harald wrote: so someone did optimize table on a large table you do yourself not a favour restarting the server in such a moment 7 hours before the server was shut down, we did a alter table to add a primary key to a table that is read-only from the web application. which means the table is most likely completly copied in a temp file and depending on the table size this takes time - you killed the alter table i guess signature.asc Description: OpenPGP digital signature
Re: Lost connection to MySQL server - need help.
We had a similar issue a bit back - and although it sounds similar - based on your followups it probably isnt, but will just toss this out there anyhows. We were experiencing connection timeouts when load would ramp up. Doing some digging we learned that our firewall between the servers bandwidth would get consumed by a large wordpress load - and this in essence backed up the rest of the requests until they timed out. We fixed that load issue which reduced the data passing through and have expereinced a significant performance boost in our app let alone reduction of these timeout issues On Sat, Oct 12, 2013 at 12:56 PM, Reindl Harald h.rei...@thelounge.netwrote: Am 12.10.2013 19:45, schrieb Jørn Dahl-Stamnes: On Saturday 12 October 2013 17:36, Reindl Harald wrote: so someone did optimize table on a large table you do yourself not a favour restarting the server in such a moment 7 hours before the server was shut down, we did a alter table to add a primary key to a table that is read-only from the web application. which means the table is most likely completly copied in a temp file and depending on the table size this takes time - you killed the alter table i guess
Re: Lost connection to MySQL server - need help.
sounds like a scheduler issue did you try deadline? http://en.wikipedia.org/wiki/Deadline_scheduler on Linux systems pass elevator=deadline as kernel param Am 12.10.2013 20:58, schrieb Chris McKeever: We had a similar issue a bit back - and although it sounds similar - based on your followups it probably isnt, but will just toss this out there anyhows. We were experiencing connection timeouts when load would ramp up. Doing some digging we learned that our firewall between the servers bandwidth would get consumed by a large wordpress load - and this in essence backed up the rest of the requests until they timed out. We fixed that load issue which reduced the data passing through and have expereinced a significant performance boost in our app let alone reduction of these timeout issues On Sat, Oct 12, 2013 at 12:56 PM, Reindl Harald h.rei...@thelounge.netwrote: Am 12.10.2013 19:45, schrieb Jørn Dahl-Stamnes: On Saturday 12 October 2013 17:36, Reindl Harald wrote: so someone did optimize table on a large table you do yourself not a favour restarting the server in such a moment 7 hours before the server was shut down, we did a alter table to add a primary key to a table that is read-only from the web application. which means the table is most likely completly copied in a temp file and depending on the table size this takes time - you killed the alter table i guess signature.asc Description: OpenPGP digital signature
connection issue
This mysql newbie is having trouble connecting to a mysqld instance, hoping someone can offer a clue on troubleshooting. I have 2 mysql 5.0.45 installations on one RHEL server. One live mysqld is setup in what appears to be a relatively standard installation, port 3306, user 'mysql', etc. I've set up the other mysqld to run tests on a non-standard port 5045, user 'testsql', different data root, config, logs, etc. When I attempt to connect to the mysqld running on port 5045 from the command-line mysql client on the same host as follows ... # mysql -P 5045 ... it seems I'm actually connecting to the live server on 3306 because 'show databases' shows the live databases. How can I troubleshoot this best? Thanks.
Re: connection issue
Hi, # mysql -P 5045 Add -h127.0.0.1 # mysql -P5045 -h127.0.0.1 Cheers -- Claudio -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: How to change max simultaneous connection parameter in mysql.
2013/3/24 Reindl Harald h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system Nginx serves static content way better than apache2 (did few benchmarks already). nginx+php5-fpm handles better load than apache2-prefork+mod_php you can google benchmarks if you dont trust me also nginx eats much less memory than apache2 php5-fpm can be tuned as well to suit your needs if you have lots of dynamic content maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) o'rly?
Re: How to change max simultaneous connection parameter in mysql.
Am 02.04.2013 16:09, schrieb spameden: 2013/3/24 Reindl Harald h.rei...@thelounge.net mailto:h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com mailto:rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. but the MySQL knowledge alone is not enough in context of a webserver not to say irrelevant 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? my config says yes as i heard about many things because it is my daily job 0 0 LOGtcp -- eth0 * !local-network/24 0.0.0.0/0multiport dports 80,443 tcpflags: 0x17/0x02 #conn src/32 50 limit: avg 100/hour burst 5 LOG flags 0 level 7 prefix Firewall Slowloris: 0 0 DROP tcp -- eth0 * !local-network/24 0.0.0.0/0multiport dports 80,443 tcpflags: 0x17/0x02 #conn src/32 50 signature.asc Description: OpenPGP digital signature
Re: How to change max simultaneous connection parameter in mysql.
Am 02.04.2013 22:56, schrieb Rick James: I hear that nginx is very fast for a certain class of web serving. yes But what happens if a web page needs to do a SELECT? what should happen? Is nginx single-threaded, thereby sitting idle waiting for the SELECT? why should it do that? And, should you run 8 nginx web servers on an 8-core box? why should you do that? http://en.wikipedia.org/wiki/Nginx nginx uses an asynchronous event-driven approach to handling requests -Original Message- From: spameden [mailto:spame...@gmail.com] Sent: Tuesday, April 02, 2013 7:10 AM To: Reindl Harald Cc: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. 2013/3/24 Reindl Harald h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system Nginx serves static content way better than apache2 (did few benchmarks already). nginx+php5-fpm handles better load than apache2-prefork+mod_php you can google benchmarks if you dont trust me also nginx eats much less memory than apache2 php5-fpm can be tuned as well to suit your needs if you have lots of dynamic content maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) o'rly? signature.asc Description: OpenPGP digital signature
RE: How to change max simultaneous connection parameter in mysql.
(Thanks for the comment, spameden.) Well, I was going to drop the thread, but he baited me. I _do_ know something about web serving... Should I recount the number of times I have traced a database meltdown back to MaxClients being too big? They are _ugly_ meltdowns -- hundreds of point-queries stumbling over themselves, flooding the slowlog with queries that should never take more than milliseconds. More and more db requests come in, non finishing, thereby stalling the web server threads, etc. Another point to make -- once a web server (Apache or...) has saturated the CPU (or other shared resource), there is really no advantage, only disadvantage, in starting more web pages. The will simply contend for the saturated resource, thereby slowing down _all_ threads. It is better (at this point) to queue up (or drop) further requests, thereby giving the CPU a chance to actually finish something. Yet another point... If [ SUM(MaxClients) over the web servers you have ] [ SUM(max_connections) over the Slaves ], then you are threatening to have mysql refuse connections; this probably leads to broken web pages, maybe even 404s or 500s. Granted, you have (at least) 3 choices: decrease MaxClients, increase max_connections, or add more Slaves. If mysql has most of max_connections _actively_ running querieds, then it is probably stumbling badly, so I vote against increasing that. Adding a Slave cannot be done 'instantly'. That leaves decreasing MaxClients, which is quick and easy. Furthermore, the SE (in one of the meltdowns) killed Apache; this led to a prompt clear up of all the issues -- poor web response, mysql melting down, etc. Sometimes less is better! -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Tuesday, April 02, 2013 8:29 AM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 02.04.2013 16:09, schrieb spameden: 2013/3/24 Reindl Harald h.rei...@thelounge.net mailto:h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com mailto:rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. but the MySQL knowledge alone is not enough in context of a webserver not to say irrelevant 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? my config says yes as i heard about many things because it is my daily job 0 0 LOGtcp -- eth0 * !local-network/24 0.0.0.0/0multiport dports 80,443 tcpflags: 0x17/0x02 #conn src/32 50 limit: avg 100/hour burst 5 LOG flags 0 level 7 prefix Firewall Slowloris: 0 0 DROP tcp -- eth0 * !local-network/24 0.0.0.0/0multiport dports 80,443 tcpflags: 0x17/0x02 #conn src/32 50 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: How to change max simultaneous connection parameter in mysql.
Am 02.04.2013 23:15, schrieb Rick James: SELECT is not performed in the same thread as nginx; it is performed in another process, or even (in big web setups) in a different host. Therefore, nginx would be in some form of wait state, thereby not really using the CPU. tell me something new -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Tuesday, April 02, 2013 2:00 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 02.04.2013 22:56, schrieb Rick James: I hear that nginx is very fast for a certain class of web serving. yes But what happens if a web page needs to do a SELECT? what should happen? Is nginx single-threaded, thereby sitting idle waiting for the SELECT? why should it do that? And, should you run 8 nginx web servers on an 8-core box? why should you do that? http://en.wikipedia.org/wiki/Nginx nginx uses an asynchronous event-driven approach to handling requests -Original Message- From: spameden [mailto:spame...@gmail.com] Sent: Tuesday, April 02, 2013 7:10 AM To: Reindl Harald Cc: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. 2013/3/24 Reindl Harald h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system Nginx serves static content way better than apache2 (did few benchmarks already). nginx+php5-fpm handles better load than apache2-prefork+mod_php you can google benchmarks if you dont trust me also nginx eats much less memory than apache2 php5-fpm can be tuned as well to suit your needs if you have lots of dynamic content maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) o'rly? signature.asc Description: OpenPGP digital signature
RE: How to change max simultaneous connection parameter in mysql.
SELECT is not performed in the same thread as nginx; it is performed in another process, or even (in big web setups) in a different host. Therefore, nginx would be in some form of wait state, thereby not really using the CPU. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Tuesday, April 02, 2013 2:00 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 02.04.2013 22:56, schrieb Rick James: I hear that nginx is very fast for a certain class of web serving. yes But what happens if a web page needs to do a SELECT? what should happen? Is nginx single-threaded, thereby sitting idle waiting for the SELECT? why should it do that? And, should you run 8 nginx web servers on an 8-core box? why should you do that? http://en.wikipedia.org/wiki/Nginx nginx uses an asynchronous event-driven approach to handling requests -Original Message- From: spameden [mailto:spame...@gmail.com] Sent: Tuesday, April 02, 2013 7:10 AM To: Reindl Harald Cc: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. 2013/3/24 Reindl Harald h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system Nginx serves static content way better than apache2 (did few benchmarks already). nginx+php5-fpm handles better load than apache2-prefork+mod_php you can google benchmarks if you dont trust me also nginx eats much less memory than apache2 php5-fpm can be tuned as well to suit your needs if you have lots of dynamic content maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) o'rly? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
RE: How to change max simultaneous connection parameter in mysql.
I hear that nginx is very fast for a certain class of web serving. But what happens if a web page needs to do a SELECT? Is nginx single-threaded, thereby sitting idle waiting for the SELECT? And, should you run 8 nginx web servers on an 8-core box? -Original Message- From: spameden [mailto:spame...@gmail.com] Sent: Tuesday, April 02, 2013 7:10 AM To: Reindl Harald Cc: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. 2013/3/24 Reindl Harald h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system Nginx serves static content way better than apache2 (did few benchmarks already). nginx+php5-fpm handles better load than apache2-prefork+mod_php you can google benchmarks if you dont trust me also nginx eats much less memory than apache2 php5-fpm can be tuned as well to suit your needs if you have lots of dynamic content maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) o'rly? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: How to change max simultaneous connection parameter in mysql.
2013/4/3 Rick James rja...@yahoo-inc.com SELECT is not performed in the same thread as nginx; it is performed in another process, or even (in big web setups) in a different host. Therefore, nginx would be in some form of wait state, thereby not really using the CPU. ofc select is not performed in nginx thread, nginx acts as a proxying server and just passes the request to the backend it's entirely depends on your backend how fast it's gonna process certain SELECT and ofc depends on what kind of database you've got if backend takes too long to respond nginx just shows 502 error with timeout from backend (by default: 30s). good practice is to have multiple backends behind load balancer, so under huge load no single request would be lost. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Tuesday, April 02, 2013 2:00 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 02.04.2013 22:56, schrieb Rick James: I hear that nginx is very fast for a certain class of web serving. yes But what happens if a web page needs to do a SELECT? what should happen? Is nginx single-threaded, thereby sitting idle waiting for the SELECT? nginx is multi threaded and it supports SMP architecture, there is main process which controls everything and nginx configuration can be reloaded with zero downtime. I saw multiple test where under load (simple DDoS simulation attack like there where 40k bots hitting the site at once) nginx+php5-fpm dropped much less requests than apache2 + mod_php. apache2 is so bad at eating memory and system resources. why should it do that? And, should you run 8 nginx web servers on an 8-core box? no, you just tune worker_processes 8; why should you do that? http://en.wikipedia.org/wiki/Nginx nginx uses an asynchronous event-driven approach to handling requests -Original Message- From: spameden [mailto:spame...@gmail.com] Sent: Tuesday, April 02, 2013 7:10 AM To: Reindl Harald Cc: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. 2013/3/24 Reindl Harald h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system Nginx serves static content way better than apache2 (did few benchmarks already). nginx+php5-fpm handles better load than apache2-prefork+mod_php you can google benchmarks if you dont trust me also nginx eats much less memory than apache2 php5-fpm can be tuned as well to suit your needs if you have lots of dynamic content maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) o'rly? -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: How to change max simultaneous connection parameter in mysql.
Am 02.04.2013 23:14, schrieb Rick James: (Thanks for the comment, spameden.) Well, I was going to drop the thread, but he baited me. I _do_ know something about web serving... maybe Should I recount the number of times I have traced a database meltdown back to MaxClients being too big? They are _ugly_ meltdowns -- hundreds of point-queries stumbling over themselves, flooding the slowlog with queries that should never take more than milliseconds. More and more db requests come in, non finishing, thereby stalling the web server threads, etc. been there, done that it is a matter of the application design to avoid deadlocks in such cases Another point to make -- once a web server (Apache or...) has saturated the CPU (or other shared resource), there is really no advantage, only disadvantage, in starting more web pages. The will simply contend for the saturated resource, thereby slowing down _all_ threads. It is better (at this point) to queue up (or drop) further requests, thereby giving the CPU a chance to actually finish something. but with 20-100 requests a webserver these days is NOT saturated MaxClients 20 is laughable i had a high trafic site with MaxClients set to 500, driven with our CMS-system teh CPU load was at 80% and the page got damned slow because you have to wait before your images could be loaded after raise MacClients to 600 it ran smooth, the CPU was around 85% again: 20-100 MaxClients is laughable and only suiteable for a dedicated, low-powered machine hosting only one domain Yet another point... If [ SUM(MaxClients) over the web servers you have ] [ SUM(max_connections) over the Slaves ], then you are threatening to have mysql refuse connections no, my db-layer is traing again for some times and the chance to get a free slot because other workers are serving images is proven in practice damned high -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Tuesday, April 02, 2013 8:29 AM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 02.04.2013 16:09, schrieb spameden: 2013/3/24 Reindl Harald h.rei...@thelounge.net mailto:h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com mailto:rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses I do not judge only on 1 parameter, Rick has been constantly helping here and I'm pretty sure he has more knowledge on MySQL than you. but the MySQL knowledge alone is not enough in context of a webserver not to say irrelevant 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes Ever heard about Slow HTTP DoS attack? my config says yes as i heard about many things because it is my daily job 0 0 LOGtcp -- eth0 * !local-network/24 0.0.0.0/0multiport dports 80,443 tcpflags: 0x17/0x02 #conn src/32 50 limit: avg 100/hour burst 5 LOG flags 0 level 7 prefix Firewall Slowloris: 0 0 DROP tcp -- eth0 * !local-network/24 0.0.0.0/0multiport dports 80,443 tcpflags: 0x17/0x02 #conn src/32 50 signature.asc Description: OpenPGP digital signature
Re: How to change max simultaneous connection parameter in mysql.
Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) signature.asc Description: OpenPGP digital signature
Re: How to change max simultaneous connection parameter in mysql.
2013/3/24 Reindl Harald h.rei...@thelounge.net Am 24.03.2013 05:20, schrieb spameden: 2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D as said, big company does not have only geniusses 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. if you are too supid to configure it yes The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned Apache 2.4 handles the load of 600 parallel executed php-scripts from our own CMS-system maybe you guys should learn what a opcode-cache is and how to compile and optimize software (binaries and config) And maybe you should learn some good manners.
Re: How to change max simultaneous connection parameter in mysql.
2013/3/19 Rick James rja...@yahoo-inc.com: you never have hosted a large site Check my email address before saying that. :D 20 may be low, but 100 is rather high. Never use apache2 it has so many problems under load.. The best combo is php5-fpm+nginx. Handles loads of users at once if well tuned. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 1:36 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 21:01, schrieb Rick James: 20 is plenty if your pages run fast enough it is not you never have hosted a large site Excess clients after MaxClients are queued in Apache so what - it doe snot help you been there, done that if you have some hundret USERS at the same time any every of them is requesting the same page with a lot of images you are simply DEAD with a limit of 20 in your configuration If the 20 are consuming resources (eg cpu/disk) it is better to queue the excess than to have everybody stumbling over each other. if your server can not serve more than 20 simultaionous requests you are not doing any serious things sorry, 20 can be done with any crappy notebook these days In MySQL, the excess clients beyond max_connections are give an error. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 12:15 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 19:26, schrieb Rick James: If you are running Apache with MaxClients set too high, that can cause the problem. too high is relative That Apache setting should be something like 20. (Other web servers have similar settings.) 20 is a laughable value as long you are not hosting only sites with no users at all i have seen MaxClients 500 be critical while the hardware was not overloaded and we had THOUSANDS of users which liked to get the website with all it's images, no way with stupid settings of 20 which means only ONE USER at the same time can fetch a single page with images and stylesheets -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: How to change max simultaneous connection parameter in mysql.
Am 19.03.2013 01:18, schrieb Rick James: you never have hosted a large site Check my email address before saying that. yahoo - so what this is a large enough copmany that i am still sure you never was allowed to touch a webserver for production 20 may be low, but 100 is rather high you do relly not understand it * i had a project with a large amoutn of parallel users * the MaxClients was up to 400 * the page-loading was UNACCEPTABLE slow * after raise up the limit to 600 it got acceptable * yes the hardware was able to satisfy the requests * yes you need a LOT of memory and CPU so please get rid of your i386 and stop to explain me the world -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 1:36 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 21:01, schrieb Rick James: 20 is plenty if your pages run fast enough it is not you never have hosted a large site Excess clients after MaxClients are queued in Apache so what - it doe snot help you been there, done that if you have some hundret USERS at the same time any every of them is requesting the same page with a lot of images you are simply DEAD with a limit of 20 in your configuration If the 20 are consuming resources (eg cpu/disk) it is better to queue the excess than to have everybody stumbling over each other. if your server can not serve more than 20 simultaionous requests you are not doing any serious things sorry, 20 can be done with any crappy notebook these days In MySQL, the excess clients beyond max_connections are give an error. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 12:15 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 19:26, schrieb Rick James: If you are running Apache with MaxClients set too high, that can cause the problem. too high is relative That Apache setting should be something like 20. (Other web servers have similar settings.) 20 is a laughable value as long you are not hosting only sites with no users at all i have seen MaxClients 500 be critical while the hardware was not overloaded and we had THOUSANDS of users which liked to get the website with all it's images, no way with stupid settings of 20 which means only ONE USER at the same time can fetch a single page with images and stylesheets signature.asc Description: OpenPGP digital signature
Re: How to change max simultaneous connection parameter in mysql.
Am 18.03.2013 19:26, schrieb Rick James: If you are running Apache with MaxClients set too high, that can cause the problem. too high is relative That Apache setting should be something like 20. (Other web servers have similar settings.) 20 is a laughable value as long you are not hosting only sites with no users at all i have seen MaxClients 500 be critical while the hardware was not overloaded and we had THOUSANDS of users which liked to get the website with all it's images, no way with stupid settings of 20 which means only ONE USER at the same time can fetch a single page with images and stylesheets signature.asc Description: OpenPGP digital signature
RE: How to change max simultaneous connection parameter in mysql.
20 is plenty if your pages run fast enough. Excess clients after MaxClients are queued in Apache. If the 20 are consuming resources (eg cpu/disk) it is better to queue the excess than to have everybody stumbling over each other. In MySQL, the excess clients beyond max_connections are give an error. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 12:15 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 19:26, schrieb Rick James: If you are running Apache with MaxClients set too high, that can cause the problem. too high is relative That Apache setting should be something like 20. (Other web servers have similar settings.) 20 is a laughable value as long you are not hosting only sites with no users at all i have seen MaxClients 500 be critical while the hardware was not overloaded and we had THOUSANDS of users which liked to get the website with all it's images, no way with stupid settings of 20 which means only ONE USER at the same time can fetch a single page with images and stylesheets -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: How to change max simultaneous connection parameter in mysql.
Am 18.03.2013 21:01, schrieb Rick James: 20 is plenty if your pages run fast enough it is not you never have hosted a large site Excess clients after MaxClients are queued in Apache so what - it doe snot help you been there, done that if you have some hundret USERS at the same time any every of them is requesting the same page with a lot of images you are simply DEAD with a limit of 20 in your configuration If the 20 are consuming resources (eg cpu/disk) it is better to queue the excess than to have everybody stumbling over each other. if your server can not serve more than 20 simultaionous requests you are not doing any serious things sorry, 20 can be done with any crappy notebook these days In MySQL, the excess clients beyond max_connections are give an error. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 12:15 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 19:26, schrieb Rick James: If you are running Apache with MaxClients set too high, that can cause the problem. too high is relative That Apache setting should be something like 20. (Other web servers have similar settings.) 20 is a laughable value as long you are not hosting only sites with no users at all i have seen MaxClients 500 be critical while the hardware was not overloaded and we had THOUSANDS of users which liked to get the website with all it's images, no way with stupid settings of 20 which means only ONE USER at the same time can fetch a single page with images and stylesheets signature.asc Description: OpenPGP digital signature
Re: How to change max simultaneous connection parameter in mysql.
On Mon, 2013-03-18 at 21:35 +0100, Reindl Harald wrote: Am 18.03.2013 21:01, schrieb Rick James: 20 is plenty if your pages run fast enough if your server can not serve more than 20 simultaionous requests you are not doing any serious things or he's using a 286 signature.asc Description: This is a digitally signed message part
RE: How to change max simultaneous connection parameter in mysql.
If you are running Apache with MaxClients set too high, that can cause the problem. That Apache setting should be something like 20. (Other web servers have similar settings.) -Original Message- From: Igor Shevtsov [mailto:nixofort...@gmail.com] Sent: Saturday, March 16, 2013 1:45 AM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Hi Kevin, In your MySQL client pls execute: SET GLOBAL max_connections = 200; To Make the change permanent you can edit /etc/my.cnf or whatever MySQL config file you you've got in your system Look for this line max_connections under [mysqld] secction, add it if it's not in the config. make sure it looks like: max_connections = 200 No MySQL restart required Cheers, Igor On 16/03/13 07:39, Manuel Arostegui wrote: 2013/3/16 Kevin Peterson qh.res...@gmail.com I am using PHP along with mysql. Mysql default configuration allows to have 100 simultaneous connection which I want to chane to 200. Please help. If you're reaching too many connections quite often, this change can imply memory problems in your server. If you are close to get your server to swap...be careful with this parameter as any swapping will affect your performance. Manuel. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
RE: How to change max simultaneous connection parameter in mysql.
you never have hosted a large site Check my email address before saying that. 20 may be low, but 100 is rather high. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 1:36 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 21:01, schrieb Rick James: 20 is plenty if your pages run fast enough it is not you never have hosted a large site Excess clients after MaxClients are queued in Apache so what - it doe snot help you been there, done that if you have some hundret USERS at the same time any every of them is requesting the same page with a lot of images you are simply DEAD with a limit of 20 in your configuration If the 20 are consuming resources (eg cpu/disk) it is better to queue the excess than to have everybody stumbling over each other. if your server can not serve more than 20 simultaionous requests you are not doing any serious things sorry, 20 can be done with any crappy notebook these days In MySQL, the excess clients beyond max_connections are give an error. -Original Message- From: Reindl Harald [mailto:h.rei...@thelounge.net] Sent: Monday, March 18, 2013 12:15 PM To: mysql@lists.mysql.com Subject: Re: How to change max simultaneous connection parameter in mysql. Am 18.03.2013 19:26, schrieb Rick James: If you are running Apache with MaxClients set too high, that can cause the problem. too high is relative That Apache setting should be something like 20. (Other web servers have similar settings.) 20 is a laughable value as long you are not hosting only sites with no users at all i have seen MaxClients 500 be critical while the hardware was not overloaded and we had THOUSANDS of users which liked to get the website with all it's images, no way with stupid settings of 20 which means only ONE USER at the same time can fetch a single page with images and stylesheets -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: How to change max simultaneous connection parameter in mysql.
2013/3/16 Kevin Peterson qh.res...@gmail.com I am using PHP along with mysql. Mysql default configuration allows to have 100 simultaneous connection which I want to chane to 200. Please help. If you're reaching too many connections quite often, this change can imply memory problems in your server. If you are close to get your server to swap...be careful with this parameter as any swapping will affect your performance. Manuel. -- Manuel Aróstegui Systems Team tuenti.com
Re: How to change max simultaneous connection parameter in mysql.
Hi Kevin, In your MySQL client pls execute: SET GLOBAL max_connections = 200; To Make the change permanent you can edit /etc/my.cnf or whatever MySQL config file you you've got in your system Look for this line max_connections under [mysqld] secction, add it if it's not in the config. make sure it looks like: max_connections = 200 No MySQL restart required Cheers, Igor On 16/03/13 07:39, Manuel Arostegui wrote: 2013/3/16 Kevin Peterson qh.res...@gmail.com I am using PHP along with mysql. Mysql default configuration allows to have 100 simultaneous connection which I want to chane to 200. Please help. If you're reaching too many connections quite often, this change can imply memory problems in your server. If you are close to get your server to swap...be careful with this parameter as any swapping will affect your performance. Manuel. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: connection issue
Thanks, Doug. How did you figure out it's because of open_files_limit? Best, Tianyin On Sat, Dec 22, 2012 at 5:51 AM, Doug d...@hacks.perl.sh wrote: sorry the problem has been resolved. it's the reason of open_files_limit too small. I increased it and the problem resolved. 2012/12/22 Doug d...@hacks.perl.sh: Hello, When connecting to mysql, sometime I got this error: # mysql -ucdn -h113.108.22x.xx -p Enter password: ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 0 But most time it's correct. What's the reason? Thanks. I am running mysql-5.1.37 on Linux, there is no firewall configured on the host. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- Tianyin XU, http://cseweb.ucsd.edu/~tixu/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
connection issue
Hello, When connecting to mysql, sometime I got this error: # mysql -ucdn -h113.108.22x.xx -p Enter password: ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 0 But most time it's correct. What's the reason? Thanks. I am running mysql-5.1.37 on Linux, there is no firewall configured on the host. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: connection issue
sorry the problem has been resolved. it's the reason of open_files_limit too small. I increased it and the problem resolved. 2012/12/22 Doug d...@hacks.perl.sh: Hello, When connecting to mysql, sometime I got this error: # mysql -ucdn -h113.108.22x.xx -p Enter password: ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 0 But most time it's correct. What's the reason? Thanks. I am running mysql-5.1.37 on Linux, there is no firewall configured on the host. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: MySQL Connection Information
No, If you are using non-persistence connection once the query get complete you are closing the connection properly. On Wed, Nov 14, 2012 at 11:44 AM, Trimurthy trimur...@tulassi.com wrote: hi every one, i am working with some application which is developed in php and back end is mysql. in this application each and every page i am including config.php which consists queries to connect to the server. the user name and password is same all the time to connect to the database server. is it causes to an extra overload on the server to process the connection request every time with the same user name and password. Normal 0 false false false EN-US X-NONE AR-SA Thanks Kind Regards, TRIMURTHY -- Best Regards, Prabhat Kumar MySQL DBA My Blog: http://adminlinux.blogspot.com My LinkedIn: http://www.linkedin.com/in/profileprabhat
Re: MySQL Connection Information
On Tue, November 13, 2012 22:38, Prabhat Kumar wrote: No, If you are using non-persistence connection once the query get complete you are closing the connection properly. Is this true if you are using mod_php or equivalent? On Wed, Nov 14, 2012 at 11:44 AM, Trimurthy trimur...@tulassi.com wrote: hi every one, i am working with some application which is developed in php and back end is mysql. in this application each and every page i am including config.php which consists queries to connect to the server. the user name and password is same all the time to connect to the database server. is it causes to an extra overload on the server to process the connection request every time with the same user name and password. Normal 0 false false false EN-US X-NONE AR-SA Thanks Kind Regards, TRIMURTHY -- Best Regards, Prabhat Kumar MySQL DBA My Blog: http://adminlinux.blogspot.com My LinkedIn: http://www.linkedin.com/in/profileprabhat -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Exporting to CSV. Error Code: 2013. Lost connection to MySQL server during query
Hi Monty, First of all, thanks so much for responding to my question! I am using MySQLworkbench 5.2.37CE. I'm pretty sure the issue has to do with something on the administrator side of things. We managed to get it so that I can click the icon to export the file, but he's still working on getting it so that we can write an sql query to do this. So for all practical purposes on my end, the question is being resolved. But I don't understand how clicking the icon after running a select query works for exporting, but the command to outfile in a sql query would not work. Thanks again On Tue, Jul 31, 2012 at 5:36 AM, Michael Widenius mo...@askmonty.orgwrote: Hi! Fred == Fred G Fred writes: Fred Thanks Dhaval. Putting the join condition before INTO outfile doesn't seem Fred to work, either. Fred When I try to use the same outfile name 'test123.csv' I get Error Code: Fred 1086 File 'test123.csv' already exists. But then when I try to find the Fred csv file on my computer, there is a folder with that name, but weird files Fred in it, none of which are a csv-- and certainly not in the location that I Fred thought it would be (the same directory that the .sql query is in). It's the mysqld server that is writing the .csv file. This means that the path is related to the mysql data directory and not to where your .sql file is. When using select into outfile it's always best to give a full path! Fred Additionally, when I try to identify a different path, such as 'C:\\' etc, Fred I get an error. This error is: Error Code: 1. Can't create/write to file Fred C:\test123.csv(Errocde: 2). This probably means that you don't have write access to C:\ Fred I tried running the query outputting to a different named .csv file, but it Fred is still just running... and seems like it was like yesterday where after Fred 10 minutes I will get the Error that the MySQL connection was lost. The reason that your connection is lost are ether: - There is timeout in the client you are using (The server never gives a timeout for running queries). - The mysqld server died (not likely but possible). - Some process in your system is killing quries that runs too long. One way to quickly check that things are working are by adding LIMIT 1 to the query. Fred Does anyone have an idea of what is going on? The query without exporting the file works fine, in about 12 sec/77 sec. I read online how to export MySQL queries into csv's, and I'm not sure what I am doing wrong. I keep getting the error: Error Code: 2013. Lost connection to MySQL server during query, where the duration/fetch values are 600.547 sec (~10 minutes). What is the exact error message? Which client are you using to do the query? It's strange that the query works fine when you are not using select into outfile. What MySQL version are you using Regards, Monty Creator of MySQL and MariaDB
Re: Exporting to CSV. Error Code: 2013. Lost connection to MySQL server during query
Hi! Fred == Fred G Fred writes: Fred Thanks Dhaval. Putting the join condition before INTO outfile doesn't seem Fred to work, either. Fred When I try to use the same outfile name 'test123.csv' I get Error Code: Fred 1086 File 'test123.csv' already exists. But then when I try to find the Fred csv file on my computer, there is a folder with that name, but weird files Fred in it, none of which are a csv-- and certainly not in the location that I Fred thought it would be (the same directory that the .sql query is in). It's the mysqld server that is writing the .csv file. This means that the path is related to the mysql data directory and not to where your .sql file is. When using select into outfile it's always best to give a full path! Fred Additionally, when I try to identify a different path, such as 'C:\\' etc, Fred I get an error. This error is: Error Code: 1. Can't create/write to file Fred C:\test123.csv(Errocde: 2). This probably means that you don't have write access to C:\ Fred I tried running the query outputting to a different named .csv file, but it Fred is still just running... and seems like it was like yesterday where after Fred 10 minutes I will get the Error that the MySQL connection was lost. The reason that your connection is lost are ether: - There is timeout in the client you are using (The server never gives a timeout for running queries). - The mysqld server died (not likely but possible). - Some process in your system is killing quries that runs too long. One way to quickly check that things are working are by adding LIMIT 1 to the query. Fred Does anyone have an idea of what is going on? The query without exporting the file works fine, in about 12 sec/77 sec. I read online how to export MySQL queries into csv's, and I'm not sure what I am doing wrong. I keep getting the error: Error Code: 2013. Lost connection to MySQL server during query, where the duration/fetch values are 600.547 sec (~10 minutes). What is the exact error message? Which client are you using to do the query? It's strange that the query works fine when you are not using select into outfile. What MySQL version are you using Regards, Monty Creator of MySQL and MariaDB -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Exporting to CSV. Error Code: 2013. Lost connection to MySQL server during query
Thanks Dhaval. Putting the join condition before INTO outfile doesn't seem to work, either. When I try to use the same outfile name 'test123.csv' I get Error Code: 1086 File 'test123.csv' already exists. But then when I try to find the csv file on my computer, there is a folder with that name, but weird files in it, none of which are a csv-- and certainly not in the location that I thought it would be (the same directory that the .sql query is in). Additionally, when I try to identify a different path, such as 'C:\\' etc, I get an error. This error is: Error Code: 1. Can't create/write to file C:\test123.csv(Errocde: 2). I tried running the query outputting to a different named .csv file, but it is still just running... and seems like it was like yesterday where after 10 minutes I will get the Error that the MySQL connection was lost. Does anyone have an idea of what is going on? On Wed, Jul 25, 2012 at 9:22 PM, Dhaval Jaiswal dhaval.jais...@via.comwrote: SELECT * FROM test INTO OUTFILE '/home/test.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '' LINES TERMINATED BY '\n' as above give your join condition before INTO OUTFILE. On Thu, Jul 26, 2012 at 1:32 AM, Fred G bayespoker...@gmail.com wrote: Hi-- I'm trying to do the following: SELECT db.emp.emp_fname, db.emp.emp_fname, db.sale.sale_date, db.sale.sale_no, db.sale.sale_total_amt into outfile 'test123.csv' FIELDS terminated by ',' FROM db.emp LEFT OUTER JOIN db.sale ON db.sale.emp_id = db.emp.emp_id; The query without exporting the file works fine, in about 12 sec/77 sec. I read online how to export MySQL queries into csv's, and I'm not sure what I am doing wrong. I keep getting the error: Error Code: 2013. Lost connection to MySQL server during query, where the duration/fetch values are 600.547 sec (~10 minutes). I'm wondering: a) What is going on? b) How do I fix it? Thanks so much!! -- [image: Inline image 2] http://www.via.com/ *Dhaval* | Database System *E:* dhaval.jais...@via.com ra...@via.com| *T:* 080 4043 3000 | *M:* +91 - 8095 397 843 [image: all-icon.jpg] http://www.via.com/
Re: Exporting to CSV. Error Code: 2013. Lost connection to MySQL server during query
2012/07/26 06:52 +0530, Dhaval Jaiswal SELECT * FROM test INTO OUTFILE '/home/test.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '' LINES TERMINATED BY '\n' as above give your join condition before INTO OUTFILE. Right: MySQL server writes into some directory where it is, not where MySQL client is. If less than a full path name is given, almost certainly the server will attempt to write into a directory to which it has no permission, and almost certainly also not into one that you want it to write into. If server and client run on separate machines with separate disks, there is no means through OUTFILE of there setting the output where the client is, only through client s standard output, where you get no choice of field separator, line separator, or field-quote character (there is none), although you can keep or skip the column names (-N for skipping them), and suppress the one-character escape character (-r), same as FIELDS ESCAPED BY ''. There is no means of skipping NULL or \N for nulls, which is not CSV format. And if your MySQL is under Windows, be sure to read all instructions about entering full pathnames. It is best to avoid the backslash (\), because that is a C-escape introduced (along with much other C-stuff) into SQL s original PL1. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Exporting to CSV. Error Code: 2013. Lost connection to MySQL server during query
Thanks! On Thu, Jul 26, 2012 at 12:05 AM, h...@tbbs.net wrote: 2012/07/26 06:52 +0530, Dhaval Jaiswal SELECT * FROM test INTO OUTFILE '/home/test.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '' LINES TERMINATED BY '\n' as above give your join condition before INTO OUTFILE. Right: MySQL server writes into some directory where it is, not where MySQL client is. If less than a full path name is given, almost certainly the server will attempt to write into a directory to which it has no permission, and almost certainly also not into one that you want it to write into. If server and client run on separate machines with separate disks, there is no means through OUTFILE of there setting the output where the client is, only through client s standard output, where you get no choice of field separator, line separator, or field-quote character (there is none), although you can keep or skip the column names (-N for skipping them), and suppress the one-character escape character (-r), same as FIELDS ESCAPED BY ''. There is no means of skipping NULL or \N for nulls, which is not CSV format. And if your MySQL is under Windows, be sure to read all instructions about entering full pathnames. It is best to avoid the backslash (\), because that is a C-escape introduced (along with much other C-stuff) into SQL s original PL1. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Exporting to CSV. Error Code: 2013. Lost connection to MySQL server during query
Hi-- I'm trying to do the following: SELECT db.emp.emp_fname, db.emp.emp_fname, db.sale.sale_date, db.sale.sale_no, db.sale.sale_total_amt into outfile 'test123.csv' FIELDS terminated by ',' FROM db.emp LEFT OUTER JOIN db.sale ON db.sale.emp_id = db.emp.emp_id; The query without exporting the file works fine, in about 12 sec/77 sec. I read online how to export MySQL queries into csv's, and I'm not sure what I am doing wrong. I keep getting the error: Error Code: 2013. Lost connection to MySQL server during query, where the duration/fetch values are 600.547 sec (~10 minutes). I'm wondering: a) What is going on? b) How do I fix it? Thanks so much!!
Re: Exporting to CSV. Error Code: 2013. Lost connection to MySQL server during query
SELECT * FROM test INTO OUTFILE '/home/test.csv' FIELDS TERMINATED BY ',' ENCLOSED BY '' LINES TERMINATED BY '\n' as above give your join condition before INTO OUTFILE. On Thu, Jul 26, 2012 at 1:32 AM, Fred G bayespoker...@gmail.com wrote: Hi-- I'm trying to do the following: SELECT db.emp.emp_fname, db.emp.emp_fname, db.sale.sale_date, db.sale.sale_no, db.sale.sale_total_amt into outfile 'test123.csv' FIELDS terminated by ',' FROM db.emp LEFT OUTER JOIN db.sale ON db.sale.emp_id = db.emp.emp_id; The query without exporting the file works fine, in about 12 sec/77 sec. I read online how to export MySQL queries into csv's, and I'm not sure what I am doing wrong. I keep getting the error: Error Code: 2013. Lost connection to MySQL server during query, where the duration/fetch values are 600.547 sec (~10 minutes). I'm wondering: a) What is going on? b) How do I fix it? Thanks so much!! -- [image: Inline image 2] http://www.via.com/ *Dhaval* | Database System *E:* dhaval.jais...@via.com ra...@via.com| *T:* 080 4043 3000 | *M:* +91 - 8095 397 843 [image: all-icon.jpg] http://www.via.com/
[Warning] Aborted connection...... (Got timeout reading communication packets)
Ladies and Gentlemen: I am getting below errors and therefore the user sessions terminate causing business impact...Can some one who is expertise already in this advice at the earliest? 120513 8:19:45 [Warning] Aborted connection 1167257 to db: 'iib' user: 'iibuser' host: '210.18.3.94' (Got timeout reading communication packets) OS version: RHEL 5.3 DB version: MYSQL 5.1 Table involved in the DB is of type : inndoDB Background : This is an online exam registration site DB and the concurrent connex invariably reaches to 200 for 500 users which should not be the case. Ideally the concurrent connex must be 10. Normally , we run truncate table before the exam starts up. A similar setup(in terms of DB/OS/config etc ) works fine which is actually DR at different site. PS: Network segment between web and DB tier has been thoroughly checked and seems to be fine. Thanks a ton! Best Rgs, Shafi AHMED Sify - Chennai Get your world in your inbox! Mail, widgets, documents, spreadsheets, organizer and much more with your Sifymail WIYI id! Log on to http://www.sify.com ** DISCLAIMER ** Information contained and transmitted by this E-MAIL is proprietary to Sify Technologies Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail notify us immediately at ad...@sifycorp.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: [Warning] Aborted connection...... (Got timeout reading communication packets)
Hello Shafi, The below blog will give you more information on the error - http://sureshkuna.blogspot.in/2010/12/aborted-connection-31084472-to-db-ms.html Thanks Suresh Kuna On Mon, May 21, 2012 at 1:15 PM, Shafi AHMED shafi.ah...@sifycorp.comwrote: Ladies and Gentlemen: I am getting below errors and therefore the user sessions terminate causing business impact...Can some one who is expertise already in this advice at the earliest? 120513 8:19:45 [Warning] Aborted connection 1167257 to db: 'iib' user: 'iibuser' host: '210.18.3.94' (Got timeout reading communication packets) OS version: RHEL 5.3 DB version: MYSQL 5.1 Table involved in the DB is of type : inndoDB Background : This is an online exam registration site DB and the concurrent connex invariably reaches to 200 for 500 users which should not be the case. Ideally the concurrent connex must be 10. Normally , we run truncate table before the exam starts up. A similar setup(in terms of DB/OS/config etc ) works fine which is actually DR at different site. PS: Network segment between web and DB tier has been thoroughly checked and seems to be fine. Thanks a ton! Best Rgs, Shafi AHMED Sify - Chennai Get your world in your inbox! Mail, widgets, documents, spreadsheets, organizer and much more with your Sifymail WIYI id! Log on to http://www.sify.com ** DISCLAIMER ** Information contained and transmitted by this E-MAIL is proprietary to Sify Technologies Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail notify us immediately at ad...@sifycorp.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- Thanks Suresh Kuna MySQL DBA
RE: [Warning] Aborted connection...... (Got timeout reading communication packets)
Hi suresh: I have gone through your blog..and feel it is more generic... Can you please elaborate why the other setup(DR) works fine when the similar prod(with no application code/web/db structural changes etc) has gone thru' successfully with no such warning msgs ? Thanks again... Best Rgs, Shafi AHMED Sify - Chennai -Original Message- From: Suresh Kuna [mailto:sureshkumar...@gmail.com] Sent: Monday, May 21, 2012 1:29 PM To: Shafi AHMED Cc: mysql@lists.mysql.com; shafi...@gmail.com Subject: Re: [Warning] Aborted connection.. (Got timeout reading communication packets) Hello Shafi, The below blog will give you more information on the error - http://sureshkuna.blogspot.in/2010/12/aborted-connection-31084472-to-db-ms.h tml Thanks Suresh Kuna On Mon, May 21, 2012 at 1:15 PM, Shafi AHMED shafi.ah...@sifycorp.comwrote: Ladies and Gentlemen: I am getting below errors and therefore the user sessions terminate causing business impact...Can some one who is expertise already in this advice at the earliest? 120513 8:19:45 [Warning] Aborted connection 1167257 to db: 'iib' user: 'iibuser' host: '210.18.3.94' (Got timeout reading communication packets) OS version: RHEL 5.3 DB version: MYSQL 5.1 Table involved in the DB is of type : inndoDB Background : This is an online exam registration site DB and the concurrent connex invariably reaches to 200 for 500 users which should not be the case. Ideally the concurrent connex must be 10. Normally , we run truncate table before the exam starts up. A similar setup(in terms of DB/OS/config etc ) works fine which is actually DR at different site. PS: Network segment between web and DB tier has been thoroughly checked and seems to be fine. Thanks a ton! Best Rgs, Shafi AHMED Sify - Chennai Get your world in your inbox! Mail, widgets, documents, spreadsheets, organizer and much more with your Sifymail WIYI id! Log on to http://www.sify.com ** DISCLAIMER ** Information contained and transmitted by this E-MAIL is proprietary to Sify Technologies Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail notify us immediately at ad...@sifycorp.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- Thanks Suresh Kuna MySQL DBA -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
RE: [Warning] Aborted connection...... (Got timeout reading communication packets)
Sorry- a typo :) Hi suresh: I have gone through your blog..and feel it is more generic... Can you please elaborate why the other setup(DR) works fine when the similar prod(with no application code/web/db structural changes etc) has gone thru' failures with such warning msgs ? Best Rgs, Shafi AHMED Sify - Chennai -Original Message- From: Shafi AHMED [mailto:shafi.ah...@sifycorp.com] Sent: Monday, May 21, 2012 2:04 PM To: 'Suresh Kuna' Cc: 'mysql@lists.mysql.com'; 'shafi...@gmail.com' Subject: RE: [Warning] Aborted connection.. (Got timeout reading communication packets) Hi suresh: I have gone through your blog..and feel it is more generic... Can you please elaborate why the other setup(DR) works fine when the similar prod(with no application code/web/db structural changes etc) has gone thru' failures with such warning msgs ? Thanks again... Best Rgs, Shafi AHMED Sify - Chennai -Original Message- From: Suresh Kuna [mailto:sureshkumar...@gmail.com] Sent: Monday, May 21, 2012 1:29 PM To: Shafi AHMED Cc: mysql@lists.mysql.com; shafi...@gmail.com Subject: Re: [Warning] Aborted connection.. (Got timeout reading communication packets) Hello Shafi, The below blog will give you more information on the error - http://sureshkuna.blogspot.in/2010/12/aborted-connection-31084472-to-db-ms.h tml Thanks Suresh Kuna On Mon, May 21, 2012 at 1:15 PM, Shafi AHMED shafi.ah...@sifycorp.comwrote: Ladies and Gentlemen: I am getting below errors and therefore the user sessions terminate causing business impact...Can some one who is expertise already in this advice at the earliest? 120513 8:19:45 [Warning] Aborted connection 1167257 to db: 'iib' user: 'iibuser' host: '210.18.3.94' (Got timeout reading communication packets) OS version: RHEL 5.3 DB version: MYSQL 5.1 Table involved in the DB is of type : inndoDB Background : This is an online exam registration site DB and the concurrent connex invariably reaches to 200 for 500 users which should not be the case. Ideally the concurrent connex must be 10. Normally , we run truncate table before the exam starts up. A similar setup(in terms of DB/OS/config etc ) works fine which is actually DR at different site. PS: Network segment between web and DB tier has been thoroughly checked and seems to be fine. Thanks a ton! Best Rgs, Shafi AHMED Sify - Chennai Get your world in your inbox! Mail, widgets, documents, spreadsheets, organizer and much more with your Sifymail WIYI id! Log on to http://www.sify.com ** DISCLAIMER ** Information contained and transmitted by this E-MAIL is proprietary to Sify Technologies Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail notify us immediately at ad...@sifycorp.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- Thanks Suresh Kuna MySQL DBA -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: [Warning] Aborted connection...... (Got timeout reading communication packets)
This needs to be investigated on the server, and cannot be guessed. On Mon, May 21, 2012 at 2:29 PM, Shafi AHMED shafi.ah...@sifycorp.comwrote: Sorry- a typo :) Hi suresh: I have gone through your blog..and feel it is more generic... Can you please elaborate why the other setup(DR) works fine when the similar prod(with no application code/web/db structural changes etc) has gone thru' failures with such warning msgs ? Best Rgs, Shafi AHMED Sify - Chennai -Original Message- From: Shafi AHMED [mailto:shafi.ah...@sifycorp.com] Sent: Monday, May 21, 2012 2:04 PM To: 'Suresh Kuna' Cc: 'mysql@lists.mysql.com'; 'shafi...@gmail.com' Subject: RE: [Warning] Aborted connection.. (Got timeout reading communication packets) Hi suresh: I have gone through your blog..and feel it is more generic... Can you please elaborate why the other setup(DR) works fine when the similar prod(with no application code/web/db structural changes etc) has gone thru' failures with such warning msgs ? Thanks again... Best Rgs, Shafi AHMED Sify - Chennai -Original Message- From: Suresh Kuna [mailto:sureshkumar...@gmail.com] Sent: Monday, May 21, 2012 1:29 PM To: Shafi AHMED Cc: mysql@lists.mysql.com; shafi...@gmail.com Subject: Re: [Warning] Aborted connection.. (Got timeout reading communication packets) Hello Shafi, The below blog will give you more information on the error - http://sureshkuna.blogspot.in/2010/12/aborted-connection-31084472-to-db-ms.h tml Thanks Suresh Kuna On Mon, May 21, 2012 at 1:15 PM, Shafi AHMED shafi.ah...@sifycorp.comwrote: Ladies and Gentlemen: I am getting below errors and therefore the user sessions terminate causing business impact...Can some one who is expertise already in this advice at the earliest? 120513 8:19:45 [Warning] Aborted connection 1167257 to db: 'iib' user: 'iibuser' host: '210.18.3.94' (Got timeout reading communication packets) OS version: RHEL 5.3 DB version: MYSQL 5.1 Table involved in the DB is of type : inndoDB Background : This is an online exam registration site DB and the concurrent connex invariably reaches to 200 for 500 users which should not be the case. Ideally the concurrent connex must be 10. Normally , we run truncate table before the exam starts up. A similar setup(in terms of DB/OS/config etc ) works fine which is actually DR at different site. PS: Network segment between web and DB tier has been thoroughly checked and seems to be fine. Thanks a ton! Best Rgs, Shafi AHMED Sify - Chennai Get your world in your inbox! Mail, widgets, documents, spreadsheets, organizer and much more with your Sifymail WIYI id! Log on to http://www.sify.com ** DISCLAIMER ** Information contained and transmitted by this E-MAIL is proprietary to Sify Technologies Limited and is intended for use only by the individual or entity to which it is addressed, and may contain information that is privileged, confidential or exempt from disclosure under applicable law. If this is a forwarded message, the content of this E-MAIL may not have been sent with the authority of the Company. If you are not the intended recipient, an agent of the intended recipient or a person responsible for delivering the information to the named recipient, you are notified that any use, distribution, transmission, printing, copying or dissemination of this information in any way or in any manner is strictly prohibited. If you have received this communication in error, please delete this mail notify us immediately at ad...@sifycorp.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- Thanks Suresh Kuna MySQL DBA -- Thanks Suresh Kuna MySQL DBA
Re: ERROR 2013 (HY000): Lost connection to MySQL server during query
If you did not work directly on mysql server (login by mysql command), please try this. Using script (PHP, ...) may lose connection, as my experience. Best --- On Mon, 3/5/12, Singer X.J. Wang w...@singerwang.com wrote: From: Singer X.J. Wang w...@singerwang.com Subject: Re: ERROR 2013 (HY000): Lost connection to MySQL server during query To: javad bakhshi javadbakh...@yahoo.com Cc: mysql@lists.mysql.com mysql@lists.mysql.com Date: Monday, March 5, 2012, 10:40 PM Checking your firewall settings.. S On Mon, Mar 5, 2012 at 08:39, javad bakhshi javadbakh...@yahoo.com wrote: Hi, Still have the same problem and changing connect_timeout didn't help. Any other Ideas? Is there even any solution to this? Best regards, Javad Bakhshi, From: mail...@securitylabs.it mail...@securitylabs.it To: mysql@lists.mysql.com Sent: Thursday, March 1, 2012 11:09 AM Subject: Re: ERROR 2013 (HY000): Lost connection to MySQL server during query Il 01/03/2012 11:03, javad bakhshi ha scritto: Hi, I am trying to load data into my table from a very large file but after some time I get this error: ERROR 2013 (HY000): Lost connection to MySQL server during query My file size is around 4G and I have 220M lines in my file which have to be loaded in to my table. I have 10 of these files which have to loaded in the same table. My MySQL version is 5.1.59, I have changed the max_allowed_packet to 346030080. any ideas how I can solve this problem? Best regards, Javad Bakhshi, In order to resolve the problem you may need to increase these two values in mysql.ini or my.cnf, and restart mysql: wait_timeout = 28800 connect_timeout = 28800 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql -- -- Pythian proud winner of Oracle North America Titan Award for Exadata Solution...watch the video on pythian.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: ERROR 2013 (HY000): Lost connection to MySQL server during query
Hi, Still have the same problem and changing connect_timeout didn't help. Any other Ideas? Is there even any solution to this? Best regards, Javad Bakhshi, From: mail...@securitylabs.it mail...@securitylabs.it To: mysql@lists.mysql.com Sent: Thursday, March 1, 2012 11:09 AM Subject: Re: ERROR 2013 (HY000): Lost connection to MySQL server during query Il 01/03/2012 11:03, javad bakhshi ha scritto: Hi, I am trying to load data into my table from a very large file but after some time I get this error: ERROR 2013 (HY000): Lost connection to MySQL server during query My file size is around 4G and I have 220M lines in my file which have to be loaded in to my table. I have 10 of these files which have to loaded in the same table. My MySQL version is 5.1.59, I have changed the max_allowed_packet to 346030080. any ideas how I can solve this problem? Best regards, Javad Bakhshi, In order to resolve the problem you may need to increase these two values in mysql.ini or my.cnf, and restart mysql: wait_timeout = 28800 connect_timeout = 28800 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
Re: ERROR 2013 (HY000): Lost connection to MySQL server during query
Checking your firewall settings.. S On Mon, Mar 5, 2012 at 08:39, javad bakhshi javadbakh...@yahoo.com wrote: Hi, Still have the same problem and changing connect_timeout didn't help. Any other Ideas? Is there even any solution to this? Best regards, Javad Bakhshi, From: mail...@securitylabs.it mail...@securitylabs.it To: mysql@lists.mysql.com Sent: Thursday, March 1, 2012 11:09 AM Subject: Re: ERROR 2013 (HY000): Lost connection to MySQL server during query Il 01/03/2012 11:03, javad bakhshi ha scritto: Hi, I am trying to load data into my table from a very large file but after some time I get this error: ERROR 2013 (HY000): Lost connection to MySQL server during query My file size is around 4G and I have 220M lines in my file which have to be loaded in to my table. I have 10 of these files which have to loaded in the same table. My MySQL version is 5.1.59, I have changed the max_allowed_packet to 346030080. any ideas how I can solve this problem? Best regards, Javad Bakhshi, In order to resolve the problem you may need to increase these two values in mysql.ini or my.cnf, and restart mysql: wait_timeout = 28800 connect_timeout = 28800 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- -- Pythian proud winner of Oracle North America Titan Award for Exadata Solution...watch the video on pythian.com
ERROR 2013 (HY000): Lost connection to MySQL server during query
Hi, I am trying to load data into my table from a very large file but after some time I get this error: ERROR 2013 (HY000): Lost connection to MySQL server during query My file size is around 4G and I have 220M lines in my file which have to be loaded in to my table. I have 10 of these files which have to loaded in the same table. My MySQL version is 5.1.59, I have changed the max_allowed_packet to 346030080. any ideas how I can solve this problem? Best regards, Javad Bakhshi,
Re: ERROR 2013 (HY000): Lost connection to MySQL server during query
Il 01/03/2012 11:03, javad bakhshi ha scritto: Hi, I am trying to load data into my table from a very large file but after some time I get this error: ERROR 2013 (HY000): Lost connection to MySQL server during query My file size is around 4G and I have 220M lines in my file which have to be loaded in to my table. I have 10 of these files which have to loaded in the same table. My MySQL version is 5.1.59, I have changed the max_allowed_packet to 346030080. any ideas how I can solve this problem? Best regards, Javad Bakhshi, In order to resolve the problem you may need to increase these two values in mysql.ini or my.cnf, and restart mysql: wait_timeout = 28800 connect_timeout = 28800 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Aborted connection 102
Hi everybody, I have this notice , 111214 11:55:53 [Warning] Aborted connection 102 to db: 'proninop_proninop' user: 'pronino' host: 'xxx.xxx.xxx.xxx' (Got timeout reading communication packets) I have watched in this site http://dev.mysql.com/doc/refman/5.0/en/communication-errors.html but I have not seen the number 102. Any idea? thanks a lot -- Mit forever My Blog http://www.redcloverbi.wordpress.com My Faborite Webhttp://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/index.htm http://www.technologyreview.com/
Re: Aborted connection 102
102 is just the run-time assigned connection id. It appears that the server bailed on a client connection due to a timeout. This suggests that either you have/had network issues, an error on the client side or someone just killed a client connection without closing properly. Unless you are seeing a lot of these, don't waste your time.. it looks like operational white-noise. - michael dykman On Wed, Dec 14, 2011 at 9:39 AM, Rafael Valenzuela rav...@gmail.com wrote: Hi everybody, I have this notice , 111214 11:55:53 [Warning] Aborted connection 102 to db: 'proninop_proninop' user: 'pronino' host: 'xxx.xxx.xxx.xxx' (Got timeout reading communication packets) I have watched in this site http://dev.mysql.com/doc/refman/5.0/en/communication-errors.html but I have not seen the number 102. Any idea? thanks a lot -- Mit forever My Blog http://www.redcloverbi.wordpress.com My Faborite Webhttp://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/index.htm http://www.technologyreview.com/ -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql
Re: Aborted connection 102
Hi Michael, Thanks :D. 2011/12/14 Michael Dykman mdyk...@gmail.com 102 is just the run-time assigned connection id. It appears that the server bailed on a client connection due to a timeout. This suggests that either you have/had network issues, an error on the client side or someone just killed a client connection without closing properly. Unless you are seeing a lot of these, don't waste your time.. it looks like operational white-noise. - michael dykman On Wed, Dec 14, 2011 at 9:39 AM, Rafael Valenzuela rav...@gmail.com wrote: Hi everybody, I have this notice , 111214 11:55:53 [Warning] Aborted connection 102 to db: 'proninop_proninop' user: 'pronino' host: 'xxx.xxx.xxx.xxx' (Got timeout reading communication packets) I have watched in this site http://dev.mysql.com/doc/refman/5.0/en/communication-errors.html but I have not seen the number 102. Any idea? thanks a lot -- Mit forever My Blog http://www.redcloverbi.wordpress.com My Faborite Web http://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/index.htm http://www.technologyreview.com/ -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql -- Mit forever My Blog http://www.redcloverbi.wordpress.com My Faborite Webhttp://ocw.mit.edu/OcwWeb/Electrical-Engineering-and-Computer-Science/index.htm http://www.technologyreview.com/
Update table on lost connection
Hi, We're busy moving legacy apps from foxpro tables to mysql. User logins were tracked via a record in a table which the app then locked, preventing multiple logins for the same user code. I want to simulate this via a locked column in a mysql table, but would need the field to be cleared if the server loses the connection to the client. How would I do this, or is there an alternative? Thanks, Alex -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Update table on lost connection
Check out the GET_LOCK and RELEASE_LOCK virtual lock functions in MySQL. -Hank On Wed, Sep 28, 2011 at 9:15 AM, Alex Schaft al...@quicksoftware.co.za wrote: Hi, We're busy moving legacy apps from foxpro tables to mysql. User logins were tracked via a record in a table which the app then locked, preventing multiple logins for the same user code. I want to simulate this via a locked column in a mysql table, but would need the field to be cleared if the server loses the connection to the client. How would I do this, or is there an alternative? Thanks, Alex -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=hes...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Practical connection limits MySQL 5.1/5.5
eBay once developed a patch for pooled threads, on top of 5.0, to resolve this kind of issue so they can support 10k+ sessions(massive amount of application need to talk to those mysql). Not sure whether they are merged into main version though. Best regards Zhuchao 在 2011-4-14，17:59，Reindl Harald h.rei...@thelounge.net 写道： Am 14.04.2011 11:50, schrieb Johan De Meersman: - Original Message - From: Reindl Harald h.rei...@thelounge.net even if you have enough memory why will you throw it away for a unusual connection count instead use the RAm for innodb-buffer-pool, query-cache, key-buffers? Maybe the application doesn't have support for connection pooling and can't be easily replaced. http://sqlrelay.sourceforge.net/sqlrelay/gettingstarted/mysql.html Maybe there's just that much clients instead of a central service Maybe the OP could clarify what he really does Maybe there's not just a single application that uses that database. http://sqlrelay.sourceforge.net/sqlrelay/gettingstarted/mysql.html As usual, Harald, you fail to realise that your experience does not encompass the whole of human civilisation. as usual people have questions without any information what they really do You seem to have a good technical background, but it might be useful to learn to consider problems from the point of view of the people who have them, at times. It tends to be a much appreciated skill in the real world. this is your point of view, ok my point of view is instead having headaches about how many connections are possible without problems to consider how many connections are really needed and without my.cnf (buffer settings), any information about the workload of the applications the whole question does not make sense -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Practical connection limits MySQL 5.1/5.5
- Original Message - From: Reindl Harald h.rei...@thelounge.net even if you have enough memory why will you throw it away for a unusual connection count instead use the RAm for innodb-buffer-pool, query-cache, key-buffers? Maybe the application doesn't have support for connection pooling and can't be easily replaced. Maybe there's just that much clients instead of a central service. Maybe there's not just a single application that uses that database. As usual, Harald, you fail to realise that your experience does not encompass the whole of human civilisation. You seem to have a good technical background, but it might be useful to learn to consider problems from the point of view of the people who have them, at times. It tends to be a much appreciated skill in the real world. -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Practical connection limits MySQL 5.1/5.5
Am 14.04.2011 11:50, schrieb Johan De Meersman: - Original Message - From: Reindl Harald h.rei...@thelounge.net even if you have enough memory why will you throw it away for a unusual connection count instead use the RAm for innodb-buffer-pool, query-cache, key-buffers? Maybe the application doesn't have support for connection pooling and can't be easily replaced. http://sqlrelay.sourceforge.net/sqlrelay/gettingstarted/mysql.html Maybe there's just that much clients instead of a central service Maybe the OP could clarify what he really does Maybe there's not just a single application that uses that database. http://sqlrelay.sourceforge.net/sqlrelay/gettingstarted/mysql.html As usual, Harald, you fail to realise that your experience does not encompass the whole of human civilisation. as usual people have questions without any information what they really do You seem to have a good technical background, but it might be useful to learn to consider problems from the point of view of the people who have them, at times. It tends to be a much appreciated skill in the real world. this is your point of view, ok my point of view is instead having headaches about how many connections are possible without problems to consider how many connections are really needed and without my.cnf (buffer settings), any information about the workload of the applications the whole question does not make sense signature.asc Description: OpenPGP digital signature
Practical connection limits MySQL 5.1/5.5
Hey All, Can anyone provide some guidance as to what the practical connection limits to MySQL 5.1/5.5 are under linux? We're running a ruby on rails application that establishes 50 to 100 connections to our database upon startup resulting in around 1,000 persistent db connections. I've been told to expect anywhere from 5 - 10x our current transaction volume and I'm trying to predict where we're going to top out. The servers are pretty beefy so I don't have a problem reserving memory for connections if that's what it takes but was more concerned about other problems that might be caused by having so many connections. I have started looking at doing connection concentration using MySQL Proxy Funnel but it doesn't look like it's been updated in a while so I'm not sure how far I'll get. Thanks
Re: Practical connection limits MySQL 5.1/5.5
Am 13.04.2011 23:50, schrieb Jeff Lee: Hey All, Can anyone provide some guidance as to what the practical connection limits to MySQL 5.1/5.5 are under linux? We're running a ruby on rails application that establishes 50 to 100 connections to our database upon startup resulting in around 1,000 persistent db connections. depends on how much RAM the box has remind that every connection needs some MB for buffers I've been told to expect anywhere from 5 - 10x our current transaction volume and I'm trying to predict where we're going to top out. i can not image why 1000 connections are needed in a real world application throw away the aüülication if it does not support connection-pooling in 2011 The servers are pretty beefy so I don't have a problem reserving memory for connections if that's what it takes but was more concerned about other problems that might be caused by having so many connections even if you have enough memory why will you throw it away for a unusual connection count instead use the RAm for innodb-buffer-pool, query-cache, key-buffers? signature.asc Description: OpenPGP digital signature
RE: Practical connection limits MySQL 5.1/5.5
i agree with harald if you're using Java you should consider pooling your database connections with DBCP http://commons.apache.org/dbcp/ feel free to ping me for implementation details takk, Martin __ Note de déni et de confidentialité Ce message est confidentiel et peut être privilégié. Si vous n'êtes pas le destinataire prévu, nous te demandons avec bonté que pour satisfaire informez l'expéditeur. N'importe quelle diffusion non autorisée ou la copie de ceci est interdite. Ce message sert à l'information seulement et n'aura pas n'importe quel effet légalement obligatoire. Étant donné que les email peuvent facilement être sujets à la manipulation, nous ne pouvons accepter aucune responsabilité pour le contenu fourni. Date: Wed, 13 Apr 2011 23:59:43 +0200 From: h.rei...@thelounge.net To: mysql@lists.mysql.com Subject: Re: Practical connection limits MySQL 5.1/5.5 Am 13.04.2011 23:50, schrieb Jeff Lee: Hey All, Can anyone provide some guidance as to what the practical connection limits to MySQL 5.1/5.5 are under linux? We're running a ruby on rails application that establishes 50 to 100 connections to our database upon startup resulting in around 1,000 persistent db connections. depends on how much RAM the box has remind that every connection needs some MB for buffers I've been told to expect anywhere from 5 - 10x our current transaction volume and I'm trying to predict where we're going to top out. i can not image why 1000 connections are needed in a real world application throw away the aüülication if it does not support connection-pooling in 2011 The servers are pretty beefy so I don't have a problem reserving memory for connections if that's what it takes but was more concerned about other problems that might be caused by having so many connections even if you have enough memory why will you throw it away for a unusual connection count instead use the RAm for innodb-buffer-pool, query-cache, key-buffers?
Re: Negative connection/thread IDs in mysqld.log?
Hi, The negative IDs is fine. You should read the document for the data type section, especially INT. David Yeung, In China, Beijing. My First Blog:http://yueliangdao0608.cublog.cn My Second Blog:http://yueliangdao0608.blog.51cto.com My Msn: yueliangdao0...@gmail.com 2010/12/15 Atle Veka at...@flyingcroc.net Hi, I tried searching for an answer to this to no avail. I noticed my mysqld.log contains negative connection/thread IDs. mysqld itself shows positive IDs as expected. Some sort of wrap? /usr/sbin/mysqld, Version: 5.0.32. started with: Tcp port: 3306 Unix socket: /tmp/mysql.sock Time Id CommandArgument 101212 8:00:01 -2049127301 Connect ... Regards, Atle -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=yueliangdao0...@gmail.com
Negative connection/thread IDs in mysqld.log?
Hi, I tried searching for an answer to this to no avail. I noticed my mysqld.log contains negative connection/thread IDs. mysqld itself shows positive IDs as expected. Some sort of wrap? /usr/sbin/mysqld, Version: 5.0.32. started with: Tcp port: 3306 Unix socket: /tmp/mysql.sock Time Id CommandArgument 101212 8:00:01 -2049127301 Connect ... Regards, Atle -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: localhost vs domain for connection string
-Original Message- From: vegiv...@gmail.com [mailto:vegiv...@gmail.com] On Behalf Of Johan De Meersman Sent: Thursday, November 25, 2010 3:29 AM To: Jerry Schwartz Cc: Brent Clark; mysql mailing list Subject: Re: localhost vs domain for connection string On Wed, Nov 24, 2010 at 4:44 PM, Jerry Schwartz je...@gii.co.jp wrote: [JS] This might or might not be enabled by default. I'm running on Windows, and I seem to remember having to change it. # Enable named pipe, bypassing the network stack enable-named-pipe Windows' named pipes are not the same as unix sockets, although the general idea is similar. I'm not sure, but I think the Unix socket file is always created. [JS] I don't remember either. I also don't remember if the original question was about *nix or Windows. Regards, Jerry Schwartz Global Information Incorporated 195 Farmington Ave. Farmington, CT 06032 860.674.8796 / FAX: 860.674.8341 E-mail: je...@gii.co.jp Web site: www.the-infoshop.com -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: localhost vs domain for connection string
On Wed, Nov 24, 2010 at 4:44 PM, Jerry Schwartz je...@gii.co.jp wrote: [JS] This might or might not be enabled by default. I'm running on Windows, and I seem to remember having to change it. # Enable named pipe, bypassing the network stack enable-named-pipe Windows' named pipes are not the same as unix sockets, although the general idea is similar. I'm not sure, but I think the Unix socket file is always created. -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel
RE: localhost vs domain for connection string
-Original Message- From: vegiv...@gmail.com [mailto:vegiv...@gmail.com] On Behalf Of Johan De Meersman Sent: Wednesday, November 24, 2010 2:39 AM To: Jerry Schwartz Cc: Brent Clark; mysql mailing list Subject: Re: localhost vs domain for connection string On Tue, Nov 23, 2010 at 7:55 PM, Jerry Schwartz je...@gii.co.jp wrote: IIRC, localhost is seen by the client as a magic word to mean use the UNIX socket, not 127.0.0.1. [JS] IF it is enabled in my.cnf. Hmm, didn't know that bit. What's the option called ? [JS] This might or might not be enabled by default. I'm running on Windows, and I seem to remember having to change it. # SERVER SECTION # -- # # The following options will be read by the MySQL Server. Make sure that # you have installed the server correctly (see above) so it reads this # file. # [mysqld] # The TCP/IP Port the MySQL Server will listen on port=3306 # Enable named pipe, bypassing the network stack enable-named-pipe = Regards, Jerry Schwartz Global Information Incorporated 195 Farmington Ave. Farmington, CT 06032 860.674.8796 / FAX: 860.674.8341 E-mail: je...@gii.co.jp Web site: www.the-infoshop.com -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
localhost vs domain for connection string
Hiya Is there a difference if someone had to make the connection string the a domain (hosts file entry makes the machine look at its ip) as opposed to just using localhost. If so would a performance hit be incurred? I have this client that has used the domain and in netstat im seeing all this tcp0 0 own.ex.ip:50340 own.ex.ip:3306 ESTABLISHED 30324/apache2 tcp0 0 own.ex.ip:50287 own.ex.ip:3306 ESTABLISHED 30309/apache2 tcp0 0 own.ex.ip:3306 own.ex.ip:50287 ESTABLISHED 29234/mysqld tcp0 0 own.ex.ip:50357 own.ex.ip:3306 ESTABLISHED 31714/apache2 tcp0 0 own.ex.ip:3306 own.ex.ip:50335 ESTABLISHED 29234/mysqld But I have another client that is using localhost and netstat is quiet as a mouse. This actually never dawned on me. Hence the reason im asking But the real reason is that the first clients machine is under heavy load and we are trying to see what can be improved. Kind Regards Brent Clark -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: localhost vs domain for connection string
IIRC, localhost is seen by the client as a magic word to mean use the UNIX socket, not 127.0.0.1. So, yes, that would make the connection not show up in netstat :-) On Tue, Nov 23, 2010 at 11:11 AM, Brent Clark brentgclarkl...@gmail.comwrote: Hiya Is there a difference if someone had to make the connection string the a domain (hosts file entry makes the machine look at its ip) as opposed to just using localhost. If so would a performance hit be incurred? I have this client that has used the domain and in netstat im seeing all this tcp0 0 own.ex.ip:50340 own.ex.ip:3306 ESTABLISHED 30324/apache2 tcp0 0 own.ex.ip:50287 own.ex.ip:3306 ESTABLISHED 30309/apache2 tcp0 0 own.ex.ip:3306 own.ex.ip:50287 ESTABLISHED 29234/mysqld tcp0 0 own.ex.ip:50357 own.ex.ip:3306 ESTABLISHED 31714/apache2 tcp0 0 own.ex.ip:3306 own.ex.ip:50335 ESTABLISHED 29234/mysqld But I have another client that is using localhost and netstat is quiet as a mouse. This actually never dawned on me. Hence the reason im asking But the real reason is that the first clients machine is under heavy load and we are trying to see what can be improved. Kind Regards Brent Clark -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=vegiv...@tuxera.be -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel
Re: localhost vs domain for connection string
From: Brent Clark brentgclarkl...@gmail.com Is there a difference if someone had to make the connection string the a domain (hosts file entry makes the machine look at its ip) as opposed to just using localhost. If so would a performance hit be incurred? Using 'localhost' will always be faster, although perhaps imperceptibly so. I look into the future because that’s where I am going to spend the rest of my life. -- George Burns Jan Steinman, EcoReality Co-op -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: localhost vs domain for connection string
-Original Message- From: vegiv...@gmail.com [mailto:vegiv...@gmail.com] On Behalf Of Johan De Meersman Sent: Tuesday, November 23, 2010 6:19 AM To: Brent Clark Cc: mysql mailing list Subject: Re: localhost vs domain for connection string IIRC, localhost is seen by the client as a magic word to mean use the UNIX socket, not 127.0.0.1. [JS] IF it is enabled in my.cnf. So, yes, that would make the connection not show up in netstat :-) On Tue, Nov 23, 2010 at 11:11 AM, Brent Clark brentgclarkl...@gmail.comwrote: Hiya Is there a difference if someone had to make the connection string the a domain (hosts file entry makes the machine look at its ip) as opposed to just using localhost. If so would a performance hit be incurred? I have this client that has used the domain and in netstat im seeing all this tcp0 0 own.ex.ip:50340 own.ex.ip:3306 ESTABLISHED 30324/apache2 tcp0 0 own.ex.ip:50287 own.ex.ip:3306 ESTABLISHED 30309/apache2 tcp0 0 own.ex.ip:3306 own.ex.ip:50287 ESTABLISHED 29234/mysqld tcp0 0 own.ex.ip:50357 own.ex.ip:3306 ESTABLISHED 31714/apache2 tcp0 0 own.ex.ip:3306 own.ex.ip:50335 ESTABLISHED 29234/mysqld But I have another client that is using localhost and netstat is quiet as a mouse. This actually never dawned on me. Hence the reason im asking But the real reason is that the first clients machine is under heavy load and we are trying to see what can be improved. Kind Regards Brent Clark -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=vegiv...@tuxera.be -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: localhost vs domain for connection string
On Tue, Nov 23, 2010 at 7:55 PM, Jerry Schwartz je...@gii.co.jp wrote: IIRC, localhost is seen by the client as a magic word to mean use the UNIX socket, not 127.0.0.1. [JS] IF it is enabled in my.cnf. Hmm, didn't know that bit. What's the option called ? -- Bier met grenadyn Is als mosterd by den wyn Sy die't drinkt, is eene kwezel Hy die't drinkt, is ras een ezel
Re: Persistent Connection VS One Time Connection Was Update Table
I have checked Apache's log. There is no refused connection. And also with MySQL I have set it to 999 connections and view the processes. Maximum connection ever reached was only around 200. What I'm thinking now is. Is it because of I use one time connection method? I mean every time the script's called I create new connection and disconnect it after execute the query. Thanks sangprabv sangpr...@gmail.com http://www.petitiononline.com/froyo/ On Sep 27, 2010, at 7:28 PM, Nigel Wood wrote: On Mon, 2010-09-27 at 11:25 +0100, Willy Mularto wrote: Hi, I work on MySQL 5 with PHP 5 and use Apache 2 as the webserver. I have a simple query that searches matched row id and update the field via HTTP GET query. On a low load it succeed update the row. But on high traffic sometimes it failed to update some rows. No errors return by the script. What usually cause this and how to solve this problem? Thanks 1.) Are you sure the script is executed under those conditions? Is Apache refusing the request because to many children have been forked? 2.) Are you sure the script will report if MySQL fails with too many connections? sangprabv sangpr...@gmail.com http://www.petitiononline.com/froyo/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: cant establish connection at application side.
On 02/09/2010 6:01 p, karthik kumar wrote: Wow .. Cool that solved our problem... Thanks a lott .. No problem, it took me two weeks to figure out why it takes sooo long to log in; :-) enjoy! -- Jangita | +256 76 91 8383 | Y! MSN: jang...@yahoo.com Skype: jangita | GTalk: jangita.nyag...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
cant establish connection at application side.
Hi .. I am facing a problem in mysql. I am getting error 'Can not open connection' at the application side which happens at random timings. What i found was at whenever the problem occurs it takes 70 secs for connecting to mysql server. The machine is a high end quad core, 16 GB ram, dedicated for mysql I guess its problem is with my configurations. My guess is like if i ve configured some buffer to x and when when mysql is being used it keeps coming down and slows down connecting time for clients ( its a wild guess ) .. So can I do something to monitor the resources/ connections/ or something else to see what does mysql lacks when connection time reaches 70 secs or my application gets a 'Can not open connection' problem so that I give a larger value for that thing .. Certainly changing (timout's .. or something else ) in application would solve but thats not a solution for my situation .. i have configured max number of connections to 500 .. and the total number of connections hardly reach 100 .. Any help please .. Thanks Karthik.
Re: cant establish connection at application side.
You might want to have a good close look at the state of your network before you consider mysql as a cause.. - michael dykman On Thu, Sep 2, 2010 at 10:57 AM, karthik kumar kumarkarth...@gmail.com wrote: Hi .. I am facing a problem in mysql. I am getting error 'Can not open connection' at the application side which happens at random timings. What i found was at whenever the problem occurs it takes 70 secs for connecting to mysql server. The machine is a high end quad core, 16 GB ram, dedicated for mysql I guess its problem is with my configurations. My guess is like if i ve configured some buffer to x and when when mysql is being used it keeps coming down and slows down connecting time for clients ( its a wild guess ) .. So can I do something to monitor the resources/ connections/ or something else to see what does mysql lacks when connection time reaches 70 secs or my application gets a 'Can not open connection' problem so that I give a larger value for that thing .. Certainly changing (timout's .. or something else ) in application would solve but thats not a solution for my situation .. i have configured max number of connections to 500 .. and the total number of connections hardly reach 100 .. Any help please .. Thanks Karthik. -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: cant establish connection at application side.
I am running a tool which just makes connection and closes it (using JDBC) .. The JDBC connection never says 'Can not establish connection' .. I just says ' at this time ' took 70 secs to establish a connection .. So my guess was network was not a problem,( since connection was established but takes extra time ) .. The application says 'Can not establish connection' = cant establish connection in a specified timeout.. Am i guessing anything wrong or can I get any ideas please ? Thanks Karthik. On Thu, Sep 2, 2010 at 8:32 PM, Michael Dykman mdyk...@gmail.com wrote: You might want to have a good close look at the state of your network before you consider mysql as a cause.. - michael dykman On Thu, Sep 2, 2010 at 10:57 AM, karthik kumar kumarkarth...@gmail.com wrote: Hi .. I am facing a problem in mysql. I am getting error 'Can not open connection' at the application side which happens at random timings. What i found was at whenever the problem occurs it takes 70 secs for connecting to mysql server. The machine is a high end quad core, 16 GB ram, dedicated for mysql I guess its problem is with my configurations. My guess is like if i ve configured some buffer to x and when when mysql is being used it keeps coming down and slows down connecting time for clients ( its a wild guess ) .. So can I do something to monitor the resources/ connections/ or something else to see what does mysql lacks when connection time reaches 70 secs or my application gets a 'Can not open connection' problem so that I give a larger value for that thing .. Certainly changing (timout's .. or something else ) in application would solve but thats not a solution for my situation .. i have configured max number of connections to 500 .. and the total number of connections hardly reach 100 .. Any help please .. Thanks Karthik. -- - michael dykman - mdyk...@gmail.com May the Source be with you.
Re: cant establish connection at application side.
On 02/09/2010 4:57 p, karthik kumar wrote: Hi .. I am facing a problem in mysql. I am getting error 'Can not open connection' at the application side which happens at random timings. What i found was at whenever the problem occurs it takes 70 secs for connecting to mysql server. The machine is a high end quad core, 16 GB ram, dedicated for mysql I guess its problem is with my configurations. My guess is like if i ve configured some buffer to x and when when mysql is being used it keeps coming down and slows down connecting time for clients ( its a wild guess ) .. So can I do something to monitor the resources/ connections/ or something else to see what does mysql lacks when connection time reaches 70 secs or my application gets a 'Can not open connection' problem so that I give a larger value for that thing .. Certainly changing (timout's .. or something else ) in application would solve but thats not a solution for my situation .. i have configured max number of connections to 500 .. and the total number of connections hardly reach 100 .. Any help please .. Thanks Karthik. Try adding skip-name-resolve on your mysql.conf file; long connection times sometimes are caused by the server trying to resolve, and with many people connecting can sometimes slow the server to a halt! Make sure that your users table has IP addresses instead of host names on the user table eg. 127.0.0.1 instead of localhost (since mysql wount resolve anymore) -- Jangita | +256 76 91 8383 | Y! MSN: jang...@yahoo.com Skype: jangita | GTalk: jangita.nyag...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: cant establish connection at application side.
I had a similar problem and found a solution. My WAMP server could not serve pages because the port that it was configured to utilize was in use by my Skype app, which loaded first. All that I had to do, was quit out of Skype, then start WAMP server, then restart Skype (which, I think, uses a different port if it's first choice is in use). Good luck. -Leslie On Thu, Sep 2, 2010 at 8:29 AM, karthik kumar kumarkarth...@gmail.comwrote: I am running a tool which just makes connection and closes it (using JDBC) .. The JDBC connection never says 'Can not establish connection' .. I just says ' at this time ' took 70 secs to establish a connection .. So my guess was network was not a problem,( since connection was established but takes extra time ) .. The application says 'Can not establish connection' = cant establish connection in a specified timeout.. Am i guessing anything wrong or can I get any ideas please ? Thanks Karthik. On Thu, Sep 2, 2010 at 8:32 PM, Michael Dykman mdyk...@gmail.com wrote: You might want to have a good close look at the state of your network before you consider mysql as a cause.. - michael dykman On Thu, Sep 2, 2010 at 10:57 AM, karthik kumar kumarkarth...@gmail.com wrote: Hi .. I am facing a problem in mysql. I am getting error 'Can not open connection' at the application side which happens at random timings. What i found was at whenever the problem occurs it takes 70 secs for connecting to mysql server. The machine is a high end quad core, 16 GB ram, dedicated for mysql I guess its problem is with my configurations. My guess is like if i ve configured some buffer to x and when when mysql is being used it keeps coming down and slows down connecting time for clients ( its a wild guess ) .. So can I do something to monitor the resources/ connections/ or something else to see what does mysql lacks when connection time reaches 70 secs or my application gets a 'Can not open connection' problem so that I give a larger value for that thing .. Certainly changing (timout's .. or something else ) in application would solve but thats not a solution for my situation .. i have configured max number of connections to 500 .. and the total number of connections hardly reach 100 .. Any help please .. Thanks Karthik. -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- Leslie Doak Classic Page Works 619-222-3625 | leslied...@gmail.com | http://www.ClassicPageWorks.com Twitter: http://twitter.com/lesliedoak | LinkedIn: http://www.linkedin.com/in/lesliedoak
Re: cant establish connection at application side.
Wow .. Cool that solved our problem... Thanks a lott .. On Thu, Sep 2, 2010 at 9:20 PM, Jangita jang...@jangita.com wrote: On 02/09/2010 4:57 p, karthik kumar wrote: Hi .. I am facing a problem in mysql. I am getting error 'Can not open connection' at the application side which happens at random timings. What i found was at whenever the problem occurs it takes 70 secs for connecting to mysql server. The machine is a high end quad core, 16 GB ram, dedicated for mysql I guess its problem is with my configurations. My guess is like if i ve configured some buffer to x and when when mysql is being used it keeps coming down and slows down connecting time for clients ( its a wild guess ) .. So can I do something to monitor the resources/ connections/ or something else to see what does mysql lacks when connection time reaches 70 secs or my application gets a 'Can not open connection' problem so that I give a larger value for that thing .. Certainly changing (timout's .. or something else ) in application would solve but thats not a solution for my situation .. i have configured max number of connections to 500 .. and the total number of connections hardly reach 100 .. Any help please .. Thanks Karthik. Try adding skip-name-resolve on your mysql.conf file; long connection times sometimes are caused by the server trying to resolve, and with many people connecting can sometimes slow the server to a halt! Make sure that your users table has IP addresses instead of host names on the user table eg. 127.0.0.1 instead of localhost (since mysql wount resolve anymore) -- Jangita | +256 76 91 8383 | Y! MSN: jang...@yahoo.com Skype: jangita | GTalk: jangita.nyag...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=kumarkarth...@gmail.com
Re: Fixed Connection Diagnostic Tool
Mike, much thanks and I have it fixed! The problem was that I screwed up setting the database permissions. I am really happy that I learned about mysql -h It will be a great help! Michel - Original Message - From: Michael Dykman mdyk...@gmail.com To: michel compu...@videotron.ca Cc: mysql@lists.mysql.com Sent: Tuesday, July 06, 2010 7:15 PM Subject: Re: Fixed Connection Diagnostic Tool C3P0 connection does, indeed work well on remote machines.. In fact, I only deploy it locally on dev servers. My production systems all use c3p0 on remote servers. Again, if you can connect from the command line of your client machine to the server *via TCP* with the same credentials as your DataSource is using, then it will all just work fine. You appear to have specified a bind address which made local TCP connections impossible. Address that, and you sohuld have no trouble at all. - md On Tue, Jul 6, 2010 at 6:45 PM, michel compu...@videotron.ca wrote: Thank you all for the help and info! This error happened because I started MySQL with -bind-address=91.203.57.207; even if Softslate is given the proper IP address and port number is fails on connection pooling. I fixed the problem by setting the MySQL IP address to 127.0.0.1. I am thinking that the reason is that the C3P0 connection pooling cannot work on a 'remote' machine. Michel - Original Message - From: Rob Wultsch wult...@gmail.com To: michel compu...@videotron.ca Cc: mysql@lists.mysql.com Sent: Tuesday, July 06, 2010 1:52 AM Subject: Re: Connection Diagnostic Tool On Mon, Jul 5, 2010 at 3:55 PM, michel compu...@videotron.ca wrote: I have been trying to figure this one out, but I don't have the skill sets here so I can use some help. I tried ' -h 127.0.0.1' in my bash shell and I get a command not found, so I am still really off-the-mark. Is there a place on the net I can look up what it does and how to run it? Thanks! I am pretty sure Michael that meant running the command line mysql client: mysql -uuser -ppass -h127.0.0.1 -e 'select hello world!' -- Rob Wultsch wult...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=compu...@videotron.ca -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=mdyk...@gmail.com -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=compu...@videotron.ca -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Fixed Connection Diagnostic Tool
Thank you all for the help and info! This error happened because I started MySQL with -bind-address=91.203.57.207; even if Softslate is given the proper IP address and port number is fails on connection pooling. I fixed the problem by setting the MySQL IP address to 127.0.0.1. I am thinking that the reason is that the C3P0 connection pooling cannot work on a 'remote' machine. Michel - Original Message - From: Rob Wultsch wult...@gmail.com To: michel compu...@videotron.ca Cc: mysql@lists.mysql.com Sent: Tuesday, July 06, 2010 1:52 AM Subject: Re: Connection Diagnostic Tool On Mon, Jul 5, 2010 at 3:55 PM, michel compu...@videotron.ca wrote: I have been trying to figure this one out, but I don't have the skill sets here so I can use some help. I tried ' -h 127.0.0.1' in my bash shell and I get a command not found, so I am still really off-the-mark. Is there a place on the net I can look up what it does and how to run it? Thanks! I am pretty sure Michael that meant running the command line mysql client: mysql -uuser -ppass -h127.0.0.1 -e 'select hello world!' -- Rob Wultsch wult...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=compu...@videotron.ca -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Fixed Connection Diagnostic Tool
C3P0 connection does, indeed work well on remote machines.. In fact, I only deploy it locally on dev servers. My production systems all use c3p0 on remote servers. Again, if you can connect from the command line of your client machine to the server *via TCP* with the same credentials as your DataSource is using, then it will all just work fine. You appear to have specified a bind address which made local TCP connections impossible. Address that, and you sohuld have no trouble at all. - md On Tue, Jul 6, 2010 at 6:45 PM, michel compu...@videotron.ca wrote: Thank you all for the help and info! This error happened because I started MySQL with -bind-address=91.203.57.207; even if Softslate is given the proper IP address and port number is fails on connection pooling. I fixed the problem by setting the MySQL IP address to 127.0.0.1. I am thinking that the reason is that the C3P0 connection pooling cannot work on a 'remote' machine. Michel - Original Message - From: Rob Wultsch wult...@gmail.com To: michel compu...@videotron.ca Cc: mysql@lists.mysql.com Sent: Tuesday, July 06, 2010 1:52 AM Subject: Re: Connection Diagnostic Tool On Mon, Jul 5, 2010 at 3:55 PM, michel compu...@videotron.ca wrote: I have been trying to figure this one out, but I don't have the skill sets here so I can use some help. I tried ' -h 127.0.0.1' in my bash shell and I get a command not found, so I am still really off-the-mark. Is there a place on the net I can look up what it does and how to run it? Thanks! I am pretty sure Michael that meant running the command line mysql client: mysql -uuser -ppass -h127.0.0.1 -e 'select hello world!' -- Rob Wultsch wult...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=compu...@videotron.ca -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=mdyk...@gmail.com -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
re: Connection Diagnostic Tool
I have been trying to figure this one out, but I don't have the skill sets here so I can use some help. I tried ' -h 127.0.0.1' in my bash shell and I get a command not found, so I am still really off-the-mark. Is there a place on the net I can look up what it does and how to run it? Thanks! - Original Message - From: Michael Dykman mdyk...@gmail.com To: michel compu...@videotron.ca Sent: Saturday, July 03, 2010 11:37 PM Subject: Re: Connection Diagnostic Tool You are right.. Java never coonnects on that domain socket, it *always* used TCP. Check your credentials at the command line using -h 127.0.0.1 (or even the LAN ip, depending on how your JDBC connections are configured) which will force your client to connect via TCP, just as Java will. I expect that you will find that there are permission errors preventing the TCP connec which are not obvious when connecting via the domain socket. - michael On Sat, Jul 3, 2010 at 11:14 PM, michel compu...@videotron.ca wrote: Michael, I am able to connect using the socket, so MySQL is working fine. The problem is when 'SoftSlate Commerce' tries to connect as localhost. From what I have been reading I am using the 'mysql.sock', but it's not at the default '/tmp/mysql.sock', it's created in /home/sgdev/mysql; so it may bew that I need a way to specify to 'SoftSlate Commerce' where the socket is. Regards, Michel - Original Message - From: Michael Dykman mdyk...@gmail.com To: michel compu...@videotron.ca Cc: mysql@lists.mysql.com Sent: Saturday, July 03, 2010 2:43 PM Subject: Re: Connection Diagnostic Tool I use c3p0 to manage MySQL connections in my JVM stack and have for years in many installations, I have never had to do anything special. If I can connect to the server through the console at the command line of the client machine using the same credentials, then the stack will just work. Are you using Tomcat's JNDI config? I have always found those to be a pain.. I manage my DataSource via Spring which I find to be much more portable. At the end of the day, if you are able to connect manually as described above but your Tomcat application cannot, it's is not a MySQL problem.. It's more likely a Tomcat/JNDI problem. If you can't connect via the command line (same client, same host, same credentials), then we have a MySQL issue we can address as such. - michael dykman On Sat, Jul 3, 2010 at 8:08 AM, michel compu...@videotron.ca wrote: I am setting up the Softslate web store package that uses Hibernate to connect to MySQL. Softslate fails to connect to MysQL on the c3p0 connection pooling. While I would love to solve this little problem it would be wiser if I learn to diagnose the problem. Is there a tool that can run on the Tomcat server that can help me replicate/diagnose the problem? Softslaste is running on the same box as MySQL. Thank you! -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=mdyk...@gmail.com -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=compu...@videotron.ca -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Connection Diagnostic Tool
On Mon, Jul 5, 2010 at 3:55 PM, michel compu...@videotron.ca wrote: I have been trying to figure this one out, but I don't have the skill sets here so I can use some help. I tried ' -h 127.0.0.1' in my bash shell and I get a command not found, so I am still really off-the-mark. Is there a place on the net I can look up what it does and how to run it? Thanks! I am pretty sure Michael that meant running the command line mysql client: mysql -uuser -ppass -h127.0.0.1 -e 'select hello world!' -- Rob Wultsch wult...@gmail.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Connection Diagnostic Tool
I am setting up the Softslate web store package that uses Hibernate to connect to MySQL. Softslate fails to connect to MysQL on the c3p0 connection pooling. While I would love to solve this little problem it would be wiser if I learn to diagnose the problem. Is there a tool that can run on the Tomcat server that can help me replicate/diagnose the problem? Softslaste is running on the same box as MySQL. Thank you! -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Connection Diagnostic Tool
I use c3p0 to manage MySQL connections in my JVM stack and have for years in many installations, I have never had to do anything special. If I can connect to the server through the console at the command line of the client machine using the same credentials, then the stack will just work. Are you using Tomcat's JNDI config? I have always found those to be a pain.. I manage my DataSource via Spring which I find to be much more portable. At the end of the day, if you are able to connect manually as described above but your Tomcat application cannot, it's is not a MySQL problem.. It's more likely a Tomcat/JNDI problem. If you can't connect via the command line (same client, same host, same credentials), then we have a MySQL issue we can address as such. - michael dykman On Sat, Jul 3, 2010 at 8:08 AM, michel compu...@videotron.ca wrote: I am setting up the Softslate web store package that uses Hibernate to connect to MySQL. Softslate fails to connect to MysQL on the c3p0 connection pooling. While I would love to solve this little problem it would be wiser if I learn to diagnose the problem. Is there a tool that can run on the Tomcat server that can help me replicate/diagnose the problem? Softslaste is running on the same box as MySQL. Thank you! -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=mdyk...@gmail.com -- - michael dykman - mdyk...@gmail.com May the Source be with you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Determine connection origins
Good day all We are trying to find out where the current connections on our Mysql database originates from. We are receiving 4000+ connections at the moment where this was usually only about half this. Is there a way of determining where the connections originates from ? i.e - website, internal, import scripts, etc... Machiel Richards MySQL DBA Relational Database Consulting RDC_Logo
