Re: MySQL server has gone away...
Are you using large blobs by any chance? when max_allowed_packet (google it ;) ) is set too small, the server will also terminate the connection with this error message. Remember to set it correctly at the server and at the client side. One of the better explanations by monty is found here: http://bugs.mysql.com/bug.php?id=2110 regards, Walter Heck On Tue, Mar 24, 2009 at 8:12 PM, Jesse j...@msdlg.com wrote: I thought that the # of connections might be a problem at some point too. The last time this happened, there were a lot of connections. Right now, there are 19 connections. How do I tell what the TTL is? I'm not too familiar with perfmon. How do I set it up to watch MySQL connections? Thanks, Jesse - Original Message - From: Gary Smith g...@primeexalia.com To: Jesse j...@msdlg.com; mysql@lists.mysql.com Sent: Tuesday, March 24, 2009 2:55 PM Subject: Re: MySQL server has gone away... Netstat -an. How many 3306 entries do you have in there. What's the TTL on them. Once the pool issues the bad connection multiple issuances of the same connection will probably result in the same error.if yoi birst to 20 connections then drop to 10 for the next 24 hours then burst to 11 that 11th might have been dropped. Next asp request gets 11. Next one gets 11. And so on until the active requests drop to the point where the connections are still active. Does this make sense? It doesn't round robin them (at least to the best of my knowledge) so some may go stayle. When testing the odbc connection some time ago I had connections stay in the pool for a day whereas my timeout was 120 minutes. Anyway. Watch the connection count with the windows perfmon and see if there is a corrolation. Sent via BlackBerry by ATT -Original Message- From: Jesse j...@msdlg.com Date: Tue, 24 Mar 2009 14:47:30 To: Jessej...@msdlg.com; mysql@lists.mysql.com Subject: Re: MySQL server has gone away... An update on this issue. It just happened again, and the first error was: [MySQL][ODBC 3.51 Driver][mysqld-5.0.67-community-nt-log]Lost connection to MySQL server during que Then, after that, I got a BUNCH of [MySQL][ODBC 3.51 Driver][mysqld-5.0.67-community-nt-log]MySQL server has gone away errors. I'm pretty sure that the 2nd errors were caused by the first error. Again, there is nothing strange in the IIS logs, or Windows Event log The database server is on the same machine as the web server, so the network should not be involved here. Why would it suddenly loose connection? Jesse - Original Message - From: Jesse j...@msdlg.com To: mysql@lists.mysql.com Sent: Tuesday, March 24, 2009 11:41 AM Subject: MySQL server has gone away... We are running MySQL Server version 5.0.67-community-nt-log on a WS03 server. It seems like every once in a while (sometimes once or twice a week, sometimes more), something will happen, then I'll start getting a lot of errors: [MySQL][ODBC 3.51 Driver][mysqld-5.0.67-community-nt-log]MySQL server has gone away This is driving me absolutely nuts. I don't see any errors in the Event Viewer, or the MySQL error log. Does anyone know of any reasons that this might happen? Jesse -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub...@msdlg.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=g...@primeexalia.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=li...@olindata.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: learning mysql
I'm quite a distance from the best person to answer this question but MySQL has weekly webinars and there are a ton of good tutorials on the web. I started with WAMP (LAMP, MAMP and XAMP are suitable alternatives) and just started reading tutorials. Then I went to the local discount store and got a book about MySQL PHP. It wasn't the most recent but it was only a few dollars and the versions were new enough to not be problematic. I like Half.com for books. If you have trouble finding tutorials then leave a message and I'll comb through my bookmarks and see if I can find some that I used. Good luck! g On Tue, Mar 24, 2009 at 9:00 PM, solarflow99 solarflo...@gmail.com wrote: hi, I'm looking for some advice where to learn mysql. Not being a DBA, I have basic knowledge of databases, and have administered them in the past. The docs on the mysql site aren't very good for this, just a few examples of commands, etc. Ideally, something that is suited for system administrators, not looking to be a DBA. Thanks..
Re: Solved Select query locks tables in Innodb
Just to close this off. Baron was correct in that the core problem was a bug in MySQL (I was using version 5.0.37.) There are some references to this bug in the MySQL bug stuff but they claim to have eliminated it in 5.0.30... apparently not. I ungraded to version 5.1.32 and the original problem disappeared and the selects behave as one would expect. Many thanks to all who offered advice. Carl - Original Message - From: Perrin Harkins per...@elem.com To: Carl c...@etrak-plus.com Cc: mysql@lists.mysql.com Sent: Friday, March 13, 2009 1:40 PM Subject: Re: Select query locks tables in Innodb 2009/3/12 Carl c...@etrak-plus.com: I am still a little puzzled about how we could have a relatively large set of records (100,000+) and yet not cause any table to be locked as the server has only 8GB of memory. What's the relationship you're implying between memory and locking? Multi-version concurrency doesn't necessarily mean the older versions that are being read from have to be entirely in memory. InnoDB will lock on a query that doesn't use an index. It shouldn't lock on a SELECT query, regardless of the indexes involved. - Perrin -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
MySQL 6.0.10 Alpha has been released!
Dear MySQL users, MySQL 6.0.10-alpha, a new version of the MySQL database system has been released. The main page for MySQL 6.0 release is at http://www.mysql.com/mysql60/ MySQL 6.0 includes two new storage engines: the transactional Falcon engine, and the crash-safe Maria engine. If you are using the Falcon storage engine in MySQL 6.0.9-alpha, you are encouraged to wait for the MySQL 6.0.11-alpha before upgrading. Live upgrade is not recommended for 6.0 alpha releases. Users are strongly encouraged to dump their database and reload them after the upgrade. If you are new to the Falcon storage engine, we encourage you to either test Falcon in MySQL 6.0.9-alpha or wait for MySQL 6.0.11-alpha. The 6.0.10 release contains a large number of bug fixes for Falcon. After 6.0.10-alpha was built several bugs were reported and fixed, and will be part of the MySQL 6.0.11-alpha release. If you are new to the Falcon storage engine and need more information, please read the Falcon Evaluation Guide at http://www.mysql.com/why-mysql/white-papers/falcon-getting-started.php and the Falcon White Paper at http://www.mysql.com/why-mysql/white-papers/storage-engines-falcon.php The Maria storage engine is a crash-safe version of MyISAM. Maria supports all of the main functionality of the MyISAM engine, plus recovery support (in the event of a system crash), all MyISAM row formats and a new Maria-specific row format. Maria is documented at http://dev.mysql.com/doc/refman/6.0/en/se-maria.html MySQL 6.0.10-alpha is available in source and binary form for a number of platforms from our download pages at http://dev.mysql.com/downloads/mysql/6.0.html and mirror sites. Note that not all mirror sites may be up to date at this point in time, so if you can't find this version on some mirror, please try again later or choose another download site. We welcome and appreciate your feedback, bug reports, bug fixes, and patches at http://forge.mysql.com/wiki/Contributing The following section lists functionality which has been added or changed, as well as security-related, incompatible and important bugs fixes since the previous version of MySQL 6.0. The full changelog including many other changes can be viewed online at http://dev.mysql.com/doc/refman/6.0/en/news-6-0-10.html Enjoy! Jonathan Perkin The MySQL Build Team, Sun Microsystems == Functionality added or changed: * Important Change: Replication: RESET MASTER and RESET SLAVE now reset the values shown for Last_IO_Error, Last_IO_Errno, Last_SQL_Error, and Last_SQL_Errno in the output of SHOW SLAVE STATUS. (Bug#34654: http://bugs.mysql.com/34654) * Replication: A new global server variable sync_relay_log is introduced for use on replication slaves. Setting this variable to a nonzero integer value N causes the slave to synchonize the relay log to disk after every N events. It is analogous to how the sync_binlog variable works for binary logs on a replication master. This variable can also be set in my.cnf using the server option --sync-relay-log. For more information, see Section 16.1.3.3, Replication Slave Options and Variables. (Bug#31665: http://bugs.mysql.com/31665, Bug#35542: http://bugs.mysql.com/35542, Bug#40337: http://bugs.mysql.com/40337) * Replication: In circular replication, it was sometimes possible for an event to propagate such that it would be reapplied on all servers. This could occur when the originating server was removed from the replication circle and so could no longer act as the terminator of its own events, as normally happens in circular replication. In order to prevent this from occurring, a new IGNORE_SERVER_IDS option is introduced for the CHANGE MASTER TO statement. This option takes a list of replication server IDs; events having a server ID which appears in this list are ignored and not applied. For more information, see Section 12.6.2.1, CHANGE MASTER TO Syntax. (Bug#25998: http://bugs.mysql.com/25998) See also Bug#27808: http://bugs.mysql.com/27808. * The libedit library was upgraded to version 2.11. (Bug#42433: http://bugs.mysql.com/42433) * A new status variable, Queries, indicates the number of statements executed by the server. This includes statements executed within stored programs, unlike the Questions variable which includes only statements sent to the server by clients. (Bug#41131: http://bugs.mysql.com/41131) * Columns that provide a catalog value in INFORMATION_SCHEMA tables (for example, TABLES.TABLE_CATALOG) now have a value of def rather than NULL. (Bug#35427: http://bugs.mysql.com/35427) * mysql-test-run.pl now supports --client-bindir and
Re: Installation Problems
Hi Roland, I wanted to know if you face the sae problems that i've faced or u get somethng else. @ Ian I've already done that. I will do what Roland told me to, lets hope i have some luck this time around. On Wed, Mar 25, 2009 at 2:15 AM, Rolando Edwards redwa...@logicworks.netwrote: Ever since MySQL 5.0.27, I have never been able to install the MySQL Service either. I think this has something to do with the way Microsoft compiles its OS Services. I use the no installer version now. 1. Go to a DOS Window and create a directory called C:\ MySQL_5.1.32 2. Click Start, Run, and type Open : C:\ MySQL_5.1.32. This will open a Windows Explorer Window in that new empty Folder. 3. Download mysql-noinstall-5.1.32.zip to the Windows Desktop 4. Open the mysql-noinstall-5.1.32.zip and another Windows Explorer window opens up containing the folder 'mysql-noinstall-5.1.32-win32' 5. Double click that 'mysql-noinstall-5.1.32-win32' folder and another window shows the folders 'bin','data','Docs' and so forth. 6. Select all files and folders by hitting Ctrl-A 7. Drag and Drop those selected files and folders into the 'C:\ MySQL_5.1.32' Window 8. Right-click on 'My Computer', and click on 'Properties' 9. Click on the Advanced Tab 10. Click the Environment Variables button 11. Scroll the bottom listbox to the PATH variable 12. Double Click the PATH variable 13. Append ';C:\MySQL_5.1.32' to the PATH variable 14. Click OK 3 times 15. In the 'C:\MySQL_5.1.32' Window, copy 'my-small' to 'my' (In other words, copy mysql-small.ini to my.ini) If you do not do this, you will be starting mysqld with all server defaults 16. Create a DOS Batch File called start_mysqld.bat with the following lines@echo off set MYSQL_HOME=C:\MySQL_5.1.32 set MYSQL_BIN=%MYSQL_HOME%\bin echo %MYSQL_BIN% cd %MYSQL_BIN% pause (This line is optional) start mysqld 17. Create a DOS Batch File called stop_mysqld.bat with the following lines @echo off set MYSQL_HOME=C:\MySQL_5.1.32 set MYSQL_BIN=%MYSQL_HOME%\bin %MYSQL_BIN%\mysqladmin -uroot shutdown 18. Create a ShortCut for both batch files and place them on the Desktop 19. Double Click the ShortCut for start_mysqld.bat This should start up mysqld Open the task manager and look for 'mysqld.exe' 20. Goto a new DOS Window and type 'mysql -uroot' You should be mysql now. If you got to this point successfully, have fun from here !!! Rolando A. Edwards MySQL DBA (CMDBA) 155 Avenue of the Americas, Fifth Floor New York, NY 10013 212-625-5307 (Work) 201-660-3221 (Cell) AIM : RolandoLogicWorx Skype : RolandoLogicWorx redwa...@logicworks.net -Original Message- From: Manish Gupta [mailto:manish.in@gmail.com] Sent: Tuesday, March 24, 2009 4:05 PM To: mysql@lists.mysql.com Subject: Installation Problems I had MySQL 4.0. Today i downloaded the recent version, mysql5.12.32-Win32 installer. I deleted the older verison of mysql that i had. I didnt have any data there and thus no upgrade was needed as such. I used typical install option and after the install i used the standard configuration for the server configuration wizard. i typed the password required and the problems started. 1. It couldnot install mysql as a service, named MySQL, although there is no service with that name. i checked with the service option in control panel. 2. I went back and installed it with the service name MySQL5. This time, it installed the service, but could not apply the security setting and terminated with the error, saying root doesnot have the permission to log on from localhost. 3. I opened the command line clien from the start menu. It asked for the password, i typed it in and the interface disappeared. I uninstalled and then installed it again a couple of times, but one or the other erroe kept reccuring. I'm still havent been able to use MySQL. Please Help.
Re: learning mysql
If you know in theory what you want to do then I recommend the certification study guide http://www.mysql.com/certification/studyguides/ olaf On 3/24/09 9:00 PM, solarflow99 solarflo...@gmail.com wrote: hi, I'm looking for some advice where to learn mysql. Not being a DBA, I have basic knowledge of databases, and have administered them in the past. The docs on the mysql site aren't very good for this, just a few examples of commands, etc. Ideally, something that is suited for system administrators, not looking to be a DBA. Thanks.. - Confidentiality Notice: The following mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. The recipient is responsible to maintain the confidentiality of this information and to use the information only for authorized purposes. If you are not the intended recipient (or authorized to receive information for the intended recipient), you are hereby notified that any review, use, disclosure, distribution, copying, printing, or action taken in reliance on the contents of this e-mail is strictly prohibited. If you have received this communication in error, please notify us immediately by reply e-mail and destroy all copies of the original message. 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: Re: learning mysql
Hi, I think in your case you should go for a traditional book approach to build a good background. In my opinion finding the right book is a matter of match between the kind of book and your background. My hint is to gather here 4/5 good book titles, go in a book shop take a while to run thru the books and 'feel' whats the best approach for you. In your case, if you want to study quite well, the most complete book I can think of is Paul DuBois 'MySQL' 4th Edition. While the certification study guide I find it not suitable for the needs of a beginner for structure, for contents and for difficulty. Cheers Claudio On Mar 25, 2009 7:44pm, Olaf Stein olaf.st...@nationwidechildrens.org wrote: If you know in theory what you want to do then I recommend the certification study guide http://www.mysql.com/certification/studyguides/ olaf On 3/24/09 9:00 PM, solarflow99 solarflo...@gmail.com wrote: hi, I'm looking for some advice where to learn mysql. Not being a DBA, I have basic knowledge of databases, and have administered them in the past. The docs on the mysql site aren't very good for this, just a few examples of commands, etc. Ideally, something that is suited for system administrators, not looking to be a DBA. Thanks.. - Confidentiality Notice: The following mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. The recipient is responsible to maintain the confidentiality of this information and to use the information only for authorized purposes. If you are not the intended recipient (or authorized to receive information for the intended recipient), you are hereby notified that any review, use, disclosure, distribution, copying, printing, or action taken in reliance on the contents of this e-mail is strictly prohibited. If you have received this communication in error, please notify us immediately by reply e-mail and destroy all copies of the original message. Thank you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=claudio.na...@gmail.com
Re: Re: learning mysql
I second Claudio's recommendation on Paul DuBois MySQL 4th edition. I've followed his book and enjoyed it. Depending on your background, especially if you work predominately in Windows, I think you will need to have easy access to a *nix machine, either a physical one or virtual machines, preferably a physical one. Learning is all about satisfying your curiosities and repetition, therefore you will need a machine as a sandbox to mess around. Speaking of sandbox, I found Giuseppe's MySQL sandbox is a great learning tool. Download it, get a tar ball binary, follow the instructions and you will have as many instances as you like, even replication. Another book that I like is Baron Schwartz's High Performance MySQL. Don't let the title fool you into thinking that this is an advanced book just for experienced practioners. It certainly is a great book for experienced people, but it is written in a way that is very much approachable to beginners as well. Good luck. My personal experience has been that it was a bit frustrating to get started, especially if you are used to other RDBMS platforms: the way login and permissions are setup, each tables can have different storage engines, different logging mechanism, MyISAM's table and index files, and InnoDb's tablespace files, backup, etc. But once you get over that, it can be pretty fun to tinker around. Haidong Alex Ji http://www.HaidongJi.com/technology On Wed, Mar 25, 2009 at 5:53 PM, claudio.na...@gmail.com wrote: Hi, I think in your case you should go for a traditional book approach to build a good background. In my opinion finding the right book is a matter of match between the kind of book and your background. My hint is to gather here 4/5 good book titles, go in a book shop take a while to run thru the books and 'feel' whats the best approach for you. In your case, if you want to study quite well, the most complete book I can think of is Paul DuBois 'MySQL' 4th Edition. While the certification study guide I find it not suitable for the needs of a beginner for structure, for contents and for difficulty. Cheers Claudio On Mar 25, 2009 7:44pm, Olaf Stein olaf.st...@nationwidechildrens.org wrote: If you know in theory what you want to do then I recommend the certification study guide http://www.mysql.com/certification/studyguides/ olaf On 3/24/09 9:00 PM, solarflow99 solarflo...@gmail.com wrote: hi, I'm looking for some advice where to learn mysql. Not being a DBA, I have basic knowledge of databases, and have administered them in the past. The docs on the mysql site aren't very good for this, just a few examples of commands, etc. Ideally, something that is suited for system administrators, not looking to be a DBA. Thanks.. - Confidentiality Notice: The following mail message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. The recipient is responsible to maintain the confidentiality of this information and to use the information only for authorized purposes. If you are not the intended recipient (or authorized to receive information for the intended recipient), you are hereby notified that any review, use, disclosure, distribution, copying, printing, or action taken in reliance on the contents of this e-mail is strictly prohibited. If you have received this communication in error, please notify us immediately by reply e-mail and destroy all copies of the original message. Thank you. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=claudio.na...@gmail.com
