RE: Here's an Idea for Re-Syncing Master and Slave During Production Hours without Interrupting Users (Much)
Hi Baron, > I'm the primary author of Maatkit. Awkward... :-) > What can I say -- you could go buy a commercial off-the-shelf tool > and believe the song and dance they feed you about the tool > being perfect. There's not a single commercial software solution in our toolbox. We're big fans of CentOS, LVS, heartbeat, ldirectord, tomcat, MySQL, Xen, pureFTP, and more. We've been happy with the performance and reliability of all of our FOSS tools. I'm definitely not a Kool-aid drinker when it comes to commercial product marketing. > At least with Maatkit, you get transparency. We make a concerted > effort to update the RISKS section of each tool with each release, so there > is full disclosure. Fair enough, but I still found the warnings a little too scary. A more complete explanation of the exact nature of the bugs and the exact circumstances under which I should be concerned about triggering them would have increased my comfort level. > I think Maatkit is by far the best solution for live master-slave sync > in most real-world situations. We'll give it another look. -- Eric Robinson Disclaimer - December 9, 2009 This email and any files transmitted with it are confidential and intended solely for Baron Schwartz,Gavin Towey,Tom Worster,my...@lists.mysql.com. If you are not the named addressee you should not disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of . Warning: Although has taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments. This disclaimer was added by Policy Patrol: http://www.policypatrol.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: Missing Entries
Carlos: > I was checking my fresh install of MySQL and noticed I had empt spaces > or missing entries in some sections when I did a search for users on > the 'mysql' database. According to this page: http://dev.mysql.com/doc/mysql-security-excerpt/5.4/en/default-privileges.ht ml If you want to prevent clients from connecting as anonymous users without a password, you should either assign a password to each anonymous account or else remove the accounts. We I do a MySQL install, I always go into the mysql client as root and issue these commands: use mysql; delete from user where Password=''; flush privileges; quit; It removes those accounts. Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net Host your MySQL database on a CentOS VPS for $25/mo Unmetered bandwidth = no overage charges, 7 day free trial -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: Missing Entries
I'm on my mobile so can't give you a link but you should read the reference manual section on 'post-installation setup and testing'. Regards John Daisley. -Original Message- From: Carlos Williams Sent: 09 December 2009 21:16 To: mysql@lists.mysql.com Subject: Missing Entries I was checking my fresh install of MySQL and noticed I had empt spaces or missing entries in some sections when I did a search for users on the 'mysql' database. I checked the MySQL FAQ's and Google and nothing gave me what I am looking for. I can't understand what this entries are blank for: mysql> select User, Password, Host, Insert_priv from user; ++---+---+-+ | User | Password | Host | Insert_priv | ++---+---+-+ | root | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | localhost | Y | | root | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | mail | Y | | root | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | 127.0.0.1 | Y | | | | localhost | N | | | | mail | N | | carlos | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | localhost | N | ++---+---+-+ I see there are 3 root users: - localhost - mail (hostname) - 127.0.0.1 (localhost IP) But after that there are two entries that are blank for 'localhost' & 'mail'. Does anyone know what they are and if I can remove them. They appear useless and clutter my database. Sorry, I am OCD. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql?unsub=john.dais...@butterflysystems.co.uk -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Missing Entries
I was checking my fresh install of MySQL and noticed I had empt spaces or missing entries in some sections when I did a search for users on the 'mysql' database. I checked the MySQL FAQ's and Google and nothing gave me what I am looking for. I can't understand what this entries are blank for: mysql> select User, Password, Host, Insert_priv from user; ++---+---+-+ | User | Password | Host | Insert_priv | ++---+---+-+ | root | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | localhost | Y | | root | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | mail | Y | | root | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | 127.0.0.1 | Y | || | localhost | N | || | mail | N | | carlos | *FDCCC9BE5FC366E7D9714988DBC7F111A950C428 | localhost | N | ++---+---+-+ I see there are 3 root users: - localhost - mail (hostname) - 127.0.0.1 (localhost IP) But after that there are two entries that are blank for 'localhost' & 'mail'. Does anyone know what they are and if I can remove them. They appear useless and clutter my database. Sorry, I am OCD. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Use stored proc result set from another stored proc without temp table?
I have a stored proc I need to call from yet another stored proc, which then needs to use the results from the called proc ... I could probably use temp table but really dont want to do that unless absolutely required. I cant use OUT parameters, because the called stored proc returns multiple rows.. can this be done (see the two samples below) or is a temp table the only way? This generates a result set DELIMITER $$ DROP PROCEDURE IF EXISTS `getCMDBdata`$$ CREATE PROCEDURE `getCMDBdata`(IN ipadd VARCHAR(16)) BEGIN DECLARE iid text; select ifnull(group_concat(distinct `ia`.`ITEMID`),'0') into iid from `federated_itemattributes` `ia` left join `federated_attributesvarchar2` `v` on(`ia`.`ITEMATTRIBUTEID` = `v`.`ITEMATTRIBUTEID`) where v.value = ipadd and ia.typeattributeid = 8259; SELECT i.itemid, i.typeattributeid, i.itemattributeid, `VALUE` , y.typeid , y.datatypeid , y.description , p.typename FROM federated_itemattributevalues i join itemattributes a on a.itemattributeid = i.itemattributeid join items t on t.itemid = i.itemid join typeattributes y on y.typeattributeid = i.typeattributeid join types p on p.typeid = y.typeid left outer join relationships r on r.ci1 = i.itemid and r.relationshiptypeid IN (2667, 2684, 2704) WHERE r.ci1 IN (iid) OR ci2 IN (iid) ORDER BY i.itemid, y.typeid; END$$ DELIMITER ; This calls the above proc and will eventually want to do things with the results: DELIMITER $$ DROP PROCEDURE IF EXISTS `getMatch`$$ CREATE PROCEDURE `getMatch`() BEGIN DECLARE done0 INT DEFAULT 0; DECLARE CID BIGINT (20); DECLARE HIP VARCHAR (16); DECLARE cur1 CURSOR FOR select distinct hostid, ip from hosts; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done0 = 1; OPEN cur1; REPEAT FETCH cur1 INTO CID,HIP; IF NOT done0 THEN CALL `getCMDBdata`(HIP); /* Do something with result above*/ END IF; UNTIL done0 END REPEAT; CLOSE cur1; END$$ DELIMITER ; -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: Select from remote server from stored procedure
Steve: > I suppose maybe making this a slave table > to the other > server... nah... lots of work there Setting your local server to be a slave of the remote server is not too hard and would be a MUCH better solution. The steps are fairly staightforward: 1. Add a slave user to the remote database 2. Tell the remote server to create a binary log 3. Tell the local server to be a slave of the remote 4. Start the slave It should take less than 1 hour to set it up. I have done it many times. It is probably not as hard as you are thinking it will be. Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net Host your MySQL database on a CentOS VPS for $25/mo Unmetered bandwidth = no overage charges, 7 day free trial -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: Select from remote server from stored procedure
So what I am reading, I guess it would be safer to just do it how I am currently doing it, as it really isn't that slow... it's just duplicating the data elsewhere (I suppose maybe making this a slave table to the other server... nah... lots of work there :P) Thanks, and I did search it before, but I guess my searching keywords were insufficient ;) Steven Staples -Original Message- From: harrison.f...@sun.com [mailto:harrison.f...@sun.com] Sent: December 9, 2009 2:07 PM To: Johan De Meersman Cc: Neil Aggarwal; Steven Staples; mysql@lists.mysql.com Subject: Re: Select from remote server from stored procedure Hello Johan, On Dec 9, 2009, at 11:22 AM, Johan De Meersman wrote: > Posted this before, but beware: federated tables do NOT use indices. > Every > select is a full table scan, and if you're talking about a logging > table > that could become very expensive very fast. This is not entirely true. If you define an index on the local federated table, and it makes sense to use it, then a remote WHERE clause will be passed through and hence use the remote index. Not all types of index accesses can be passed through such as this, however for a single row lookup on a primary key, it should be fine. It is still not as fast as local access, but it's not as bad as always doing a full table scan remotely. > On Wed, Dec 9, 2009 at 4:13 PM, Neil Aggarwal > wrote: > >>> Is this possible to do? To make a connection, inside the >>> stored procedure >>> to a completely different machine and access the mysql there? >> >> The only way I know to access tables from different servers >> from a single connection is federated tables: >> http://dev.mysql.com/doc/refman/5.0/en/federated-use.html >> >> Once you do that, you are accessing it like a local table. >> >> I hope this helps. >> >> Neil Regards, Harrison -- Harrison C. Fisk, MySQL Staff Support Engineer MySQL @ Sun Microsystems, Inc., http://www.sun.com/mysql/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=sstap...@mnsi.net No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.709 / Virus Database: 270.14.97/2550 - Release Date: 12/09/09 02:32:00 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: Join on a where clause.
Joerg: > A matching column is called an "equijoin" > However, that is not mandatory / the only form. > As long as the problem can be solved using ranges (or multiple ranges) > which do not overlap, the join should solve it. I just learned something. Thanks for the info! Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net Host your MySQL database on a CentOS VPS for $25/mo Unmetered bandwidth = no overage charges, 7 day free trial -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: login problem from django script, using python2.5/MySQLdb/connections.py
Access Denied means you're using an incorrect username and password combination. Test your credentials using the mysql cli. You can log in as root to mysql to make changes as necessary, or supply the correct user/pass from your script. Regards, Gavin Towey -Original Message- From: John Griessen [mailto:j...@industromatic.com] Sent: Wednesday, December 09, 2009 10:16 AM To: mysql@lists.mysql.com Subject: login problem from django script, using python2.5/MySQLdb/connections.py If I can login from a shell, what could stop a script from login? I'm following a newbie tutorial for django, a web content mgt. system. The following user and password are good if I use them fromthe same shell the script launches from. Here's the error message from a django script using a python module about mysql: File "/usr/lib/pymodules/python2.5/MySQLdb/connections.py", line 170, in __init__ super(Connection, self).__init__(*args, **kwargs2) _mysql_exceptions.OperationalError: (1044, "Access denied for user 'django_editor'@'%' to database 'django_server'") Any ideas? thanks, John -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=gto...@ffn.com This message contains confidential information and is intended only for the individual named. If you are not the named addressee, you are notified that reviewing, disseminating, disclosing, copying or distributing this e-mail is strictly prohibited. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses. The sender therefore does not accept liability for any loss or damage caused by viruses or errors or omissions in the contents of this message, which arise as a result of e-mail transmission. [FriendFinder Networks, Inc., 220 Humbolt court, Sunnyvale, CA 94089, USA, FriendFinder.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: login problem from django script, using python2.5/MySQLdb/connections.py
John Griessen wrote: If I can login from a shell, what could stop a script from login? privileges were stopping it and at first, maybe a mistake in GRANT setup of a new user. Nevermind JG -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Select from remote server from stored procedure
Hello Johan, On Dec 9, 2009, at 11:22 AM, Johan De Meersman wrote: Posted this before, but beware: federated tables do NOT use indices. Every select is a full table scan, and if you're talking about a logging table that could become very expensive very fast. This is not entirely true. If you define an index on the local federated table, and it makes sense to use it, then a remote WHERE clause will be passed through and hence use the remote index. Not all types of index accesses can be passed through such as this, however for a single row lookup on a primary key, it should be fine. It is still not as fast as local access, but it's not as bad as always doing a full table scan remotely. On Wed, Dec 9, 2009 at 4:13 PM, Neil Aggarwal wrote: Is this possible to do? To make a connection, inside the stored procedure to a completely different machine and access the mysql there? The only way I know to access tables from different servers from a single connection is federated tables: http://dev.mysql.com/doc/refman/5.0/en/federated-use.html Once you do that, you are accessing it like a local table. I hope this helps. Neil Regards, Harrison -- Harrison C. Fisk, MySQL Staff Support Engineer MySQL @ Sun Microsystems, Inc., http://www.sun.com/mysql/ -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Join on a where clause.
Hi everybody! Neil Aggarwal wrote: > Paul: > >> SELECT COUNT(event.src_ip) AS count, INET_NTOA(event.src_ip), >> mappings.cc FROM event, mappings WHERE event.timestamp BETWEEN >> '2009-12-06 20:00' and '2009-12-07 20:00:00' AND event.src_ip BETWEEN >> 'mappings.start_ip' AND 'mappings.end_ip' GROUP BY event.src_ip ORDER >> BY count DESC LIMIT 20; I am surprised by the quotes you have around the "start_ip" and "end_ip" columns; to me, this makes that look like strings. From your posting, I see the result you hope to get but not the one you actually get. IMO, just dropping the single quotes around the two column names should produce the data you want to get. Or what is the result you receive? > > Hmm.. The hard part is that your mappings > table is not a list of all IP addresses. > It has a range from start to end, but the > actual IP in the event table is not listed > there. > > Joins require a column value from each table > to match. That is not the case for you. A matching column is called an "equijoin" (from "equality") in SQL slang, and this is the most common form of a join. (Also, it is the fastest, if there are suitable indices which can be used.) However, that is not mandatory / the only form. You can have a join with any predicate combining columns of the (two) involved tables. You can even have a join without any such predicate, which means every combination of any two rows of the tables is to be returned. This is known as "Cartesian Product" and is in most cases not what you want. > > I think you are going to have to do this in > your application code. I never dealt with the assignment of IP addresses to countries. As long as the problem can be solved using ranges (or multiple ranges) which do not overlap, the join should solve it. Regards, Jörg -- Joerg Bruehe, MySQL Build Team, joerg.bru...@sun.com (+49 30) 417 01 487 Sun Microsystems GmbH, Komturstraße 18a, D-12099 Berlin Geschaeftsfuehrer: Thomas Schroeder, Wolfgang Engels, Wolf Frenkel Vorsitzender des Aufsichtsrates: Martin Haering Muenchen: HRB161028 -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
login problem from django script, using python2.5/MySQLdb/connections.py
If I can login from a shell, what could stop a script from login? I'm following a newbie tutorial for django, a web content mgt. system. The following user and password are good if I use them fromthe same shell the script launches from. Here's the error message from a django script using a python module about mysql: File "/usr/lib/pymodules/python2.5/MySQLdb/connections.py", line 170, in __init__ super(Connection, self).__init__(*args, **kwargs2) _mysql_exceptions.OperationalError: (1044, "Access denied for user 'django_editor'@'%' to database 'django_server'") Any ideas? thanks, John -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Select from remote server from stored procedure
Posted this before, but beware: federated tables do NOT use indices. Every select is a full table scan, and if you're talking about a logging table that could become very expensive very fast. On Wed, Dec 9, 2009 at 4:13 PM, Neil Aggarwal wrote: > > Is this possible to do? To make a connection, inside the > > stored procedure > > to a completely different machine and access the mysql there? > > The only way I know to access tables from different servers > from a single connection is federated tables: > http://dev.mysql.com/doc/refman/5.0/en/federated-use.html > > Once you do that, you are accessing it like a local table. > > I hope this helps. > >Neil > > -- > Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net > Host your MySQL database on a CentOS VPS for $25/mo > Unmetered bandwidth = no overage charges, 7 day free trial > > > -- > MySQL General Mailing List > For list archives: http://lists.mysql.com/mysql > To unsubscribe:http://lists.mysql.com/mysql?unsub=vegiv...@tuxera.be > >
RE: Select from remote server from stored procedure
> Is this possible to do? To make a connection, inside the > stored procedure > to a completely different machine and access the mysql there? The only way I know to access tables from different servers from a single connection is federated tables: http://dev.mysql.com/doc/refman/5.0/en/federated-use.html Once you do that, you are accessing it like a local table. I hope this helps. Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net Host your MySQL database on a CentOS VPS for $25/mo Unmetered bandwidth = no overage charges, 7 day free trial -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Select from remote server from stored procedure
Ok, I feel silly for asking this, but I am going to do it anyway. I have a huge stored procedure that does quite a bit of logic, and gathering/splitting of data. I currently have our customer database on one server, and our logging on another. What i need to do, is to pull the customer id from the other server, so that the logs are tied back to the customer. Is this possible to do? To make a connection, inside the stored procedure to a completely different machine and access the mysql there? Does my question make sense? Currently what I am doing, is every new customer that gets created, my php app adds the username/customerid to that server, then makes a connection to the logging server and creates the same record, same with deleting and updating... but there just has to be a simpler way :) Thanks in advance. Steven Staples -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
RE: Join on a where clause.
Paul: > SELECT COUNT(event.src_ip) AS count, INET_NTOA(event.src_ip), > mappings.cc FROM event, mappings WHERE event.timestamp BETWEEN > '2009-12-06 20:00' and '2009-12-07 20:00:00' AND event.src_ip BETWEEN > 'mappings.start_ip' AND 'mappings.end_ip' GROUP BY event.src_ip ORDER > BY count DESC LIMIT 20; Hmm.. The hard part is that your mappings table is not a list of all IP addresses. It has a range from start to end, but the actual IP in the event table is not listed there. Joins require a column value from each table to match. That is not the case for you. I think you are going to have to do this in your application code. I hope this helps, Neil -- Neil Aggarwal, (281)846-8957, http://UnmeteredVPS.net Host your MySQL database on a CentOS VPS for $25/mo Unmetered bandwidth = no overage charges, 7 day free trial -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Join on a where clause.
I have 2 tables:
1) Event Data
2) Mappings
The query should return something like this:
Hits IP Country Code
20213.136.52.29 SE
I am trying this:
SELECT COUNT(event.src_ip) AS count, INET_NTOA(event.src_ip),
mappings.cc FROM event, mappings WHERE event.timestamp BETWEEN
'2009-12-06 20:00' and '2009-12-07 20:00:00' AND event.src_ip BETWEEN
'mappings.start_ip' AND 'mappings.end_ip' GROUP BY event.src_ip ORDER
BY count DESC LIMIT 20;
Am I supposed to do a join somewhere? Do joins even apply in a where
clause? or am I totally off the mark.
Singularly, the queries look like this:
SELECT cc FROM mappings WHERE INET_ATON('src_ip') BETWEEN start_ip AND end_ip;
SELECT COUNT(src_ip) AS count, INET_NTOA(src_ip) FROM event WHERE
timestamp BETWEEN '2009-12-06 20:00' and '2009-12-07 20:00:00' GROUP
BY src_ip ORDER BY count DESC LIMIT 20;
Thanks.
--
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Re: MySQL variables
On 09/12/2009, at 6:56 PM, machiel.richards wrote: Good day guys (and girls if any) I am constantly in a position where variables on a production mysql database needs to be changed. The database runs a 24/7 system and thus to reboot is not preffered and should be the absolute last resort. How can I set variables to be effective immediately? ( I am still a junior in mysql dba and still learning) If you take a look at the manual in the section about server options and variables (http://dev.mysql.com/doc/refman/5.0/en/mysqld-option- tables.html in MySQL 5.0 or http://dev.mysql.com/doc/refman/5.1/en/ mysqld-option-tables.html in MySQL 5.1), then you can see which settings can be changed dynamically. To change a variable dynamically you need to have super privilege, and then set the variable as e.g. SET GLOBAL system_var_name = ... If I set these will it still be effective should the database be restarted somewhere in the future? The change above will not persist when the database is restarted. In order to ensure that, you will have to update the configuration file as well. - Jesper Thanks in advance for your help. Regards -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: Force index command in sql query
On 09/12/2009, at 5:10 PM, Jeetendra Ranjan wrote: Hi, After analysing slow query log i found that some queries are not using index and so i used the force index command in query and test it and now it starts using index properly.Accordingly i implemented the same query with force index in my application code and regeneratet the slow query log. Now i found that the same queries having force index clause are againg not using index and surprisingly its starting using index without any force index clause. Please suggest how it happened and should i continue with the force index command in that query or remove the force index clause from those queries ? One of the things to be aware of is that "force index" only forces the index if the optimizer chooses to use an index. That is, if the optimizer decides it is better to do a table scan or the join order changes so the index cannot be used, then it will not use it. It might be worth trying to do an "EXPLAIN EXTENDED ..." followed by "SHOW WARNINGS" to see how the optimizer has reorganized the query. Hope that helps. - Jesper Thanks & Regards Jeetendra Ranjan -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
