I’ve been talking and writing a bit lately about the scaling problems I’m seeing on fast servers running lots of queries. As a rough guide, I’m seeing this in servers running 20k queries per second and higher, lots of memory, lots of CPU cores, and most queries are running faster than one millisecond; some in [...]
Percona Server 5.0.90-build21
May 7, 2010 By 1 Comment
Dear Community, Percona Server 5.0.90, release 21 is available for use. Comparing to the previous release it has following new features: The build is based on MySQL-5.0.90 Fixed bugs: Fixed Bug #539190 Percona-XtraDB package doesn’t allow libmysqlclient15off Fixed Bug #479106 mysql-5.0.87 + patches-5.0.86 compile fail in ubuntu 9.10 (karmic) Fixed tests mysql, mysql_upgrade, ssl* See [...]
Too many connections? No problem!
March 23, 2010 By 28 Comments
Did that ever happen to you in production?
1 2 | [percona@sandbox msb_5_0_87]$ ./use ERROR 1040 (00000): Too many connections |
Just happened to one of our customers. Want to know what we did?
Upgrading MySQL
January 5, 2010 By 23 Comments
Upgrading MySQL Server is a very interesting task as you can approach it with so much different “depth”. For some this is 15 minutes job for others it is many month projects. Why is that ? Performing MySQL upgrade two things should normally worry you. It is Regressions – functionality regressions when what you’ve been [...]
5.0.87-build20 Percona binaries
November 18, 2009 By 3 Comments
Dear Community, We are pleased to present the 20th build of MySQL server with Percona patches. Comparing to the previous release it has following new features: The build is based on MySQL-5.0.87 innodb_rw_lock.patch is ported from InnoDB Plugin 1.0.3 To be compatible with RedHat RPM repository, the naming scheme has changed to
1 | <rpm name>-<mysql version>-<percona build version>.<buildnumber>.<redhat version>.<architecture>.rpm |
Example:
1 | MySQL-server-percona-5.0.87-b20.29.rhel5.x86_64.rpm |
[...]
table_cache negative scalability
November 16, 2009 By 23 Comments
Couple of months ago there was a post by FreshBooks on getting great performance improvements by lowering table_cache variable. So I decided to investigate what is really happening here. The “common sense” approach to tuning caches is to get them as large as you can if you have enough resources (such as memory). With MySQL [...]
5.0.86-build19 Percona binaries
October 12, 2009 By 10 Comments
Dear Community, As of today the 19-th build of MySQL server with Percona patches is available. Comparing to the previous release it has following new features: The build is based on MySQL-5.0.86 Fix from Neil Katin to userstatv2.patch fix InnoDB slowness with large queries Fixed bugs in the build: Bug #413858 in Percona patches: “Crash [...]
5.0.84-build18 Percona binaries
August 11, 2009 By 4 Comments
Dear Community, The 18-th build of MySQL server with Percona patches is available now. Comparing to the previous release it has following new features: The build is based on MySQL-5.0.84 Fixed the issue with CLIENT_STATISTICS New patch innodb_recovery_patches.patch greatly improves recovery time Fixed bugs in the build: Bug #407117 in Percona patches: “any mysql-test fails [...]
Copying InnoDB tables between servers
July 31, 2009 By 11 Comments
The feature I announced some time ago http://www.mysqlperformanceblog.com/2009/06/08/impossible-possible-moving-innodb-tables-between-servers/ is now available in our latest releases of XtraBackup 0.8.1 and XtraDB-6. Now I am going to show how to use it (the video will be also available on percona.tv). Let’s take tpcc schema and running standard MySQL ® 5.0.83, and assume we want to copy order_line [...]
5.0.83-build17 Percona binaries
July 28, 2009 By 19 Comments
Dear Community, The build 17 of MySQL with Percona patches is available. New features in the release: MySQL-5.0.83 is taken as the basis The new patch innodb_use_sys_malloc.patch is added The new patch innodb_split_buf_pool_mutex.patch is added This patch splits the single global InnoDB buffer pool mutex into several mutexes for different purposes. This reduces mutex contention. [...]
