Post: Aligning IO on a hard disk RAID – the Benchmarks
….088 TB 1 (1-0-0) 2 2-2 64 Optimal WT, RA PhysiclDev Type State Errors Vendor Model Size ========== ==== ======= ====== ======= ============ =========== Hard… running on a Percona Server 5.0.92-87...
View ArticlePost: Shard-Query EC2 images available
…query-innodb-demo-64bit x86_64 Percona Server 5.5.11 with XtraDB. Requires m1.large or larger…14.573 InnoDB my.cnf [client] port=3306 socket=/tmp/mysql-inno.sock [mysqld] socket=/tmp/mysql-inno.sock...
View ArticlePost: How Percona does a MySQL Performance Audit
…my.cnf files. In fact my.cnf files are usually one of the smallest levers we can pull for server optimization. Schema and query optimization… in some cases): vmstat 5 5 iostat -dx 5 5 If you don’t...
View ArticlePost: InnoDB Full-text Search in MySQL 5.6 (part 1)
… editions of MySQL 5.5.30 and MySQL 5.6.10 with… = 1 in /etc/my.cnf), but I think …mysql> set global innodb_optimize_fulltext_only=1; mysql> select * from information_schema.innodb_ft_config;...
View ArticlePost: Profiling MySQL Memory Usage With Valgrind Massif
…[generally available] packages may contain optimized or stripped binaries, which are optimized for speed rather than …include –default-file=/etc/my.cnf (if this is where your my.cnf file is located)...
View ArticlePost: Review of MySQL 5.6 Defaults Changes
… of defaults changes in MySQL 5.6 compared to MySQL 5.5 In general there …my.cnf and getting rid of old my-huge.cnf which are great. Perhaps my jokes about my-huge my-large etc referring to amounts of...
View ArticlePost: MySQL and the SSB - Part 2 - MyISAM vs InnoDB low concurrency
…my previous blog post I compared MySQL 5.5.30 to MySQL 5.6.10, both with default settings using only the InnoDB storage engine. In my…unique challenge to the database optimizer. The SSB benchmark...
View ArticlePost: Percona Server 5.5.30-30.2 rerelease fixes non-restart issue
… RHEL 5 and CentOS 5. Bug fixed #1144777 (Ignacio Nin). When mysqldump was used with –innodb-optimize… set in the [client] section of the my.cnf. Bug fixed #1155859 (Sergei Glushchenko). Fixed the...
View ArticlePost: Percona Server for MySQL 5.5.30-30.2 now available
…MySQL version 5.5.30-30.2[/caption] Percona is glad to announce the release of Percona Server for MySQL 5.5… 5 and CentOS 5. Bug fixed #1144777 (Ignacio Nin). When mysqldump was used with...
View ArticlePost: Choosing a MySQL HA Solution - Post-Webinar Q&A
…a virtual-machine approach, but for the optimal production deployment you want two identical physical…the slave_compressed_protocol option in /etc/my.cnf if bandwidth is a concern. If you… What is my...
View ArticleWhen to use Hardware upgrade instead of Software Optimization
One typical question which frequently pops up is whenever it is better to use hardware upgrade or optimize software more. I already wrote about it, for example here.Today I’ll look at the same topic...
View ArticleWhy you should ignore MySQL’s key cache hit ratio
I have not caused a fist fight in a while, so it’s time to take off the gloves. I claim that somewhere around of 99% of advice about tuning MySQL’s key cache hit ratio is wrong, even when you hear it...
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Tuning InnoDB Concurrency Tickets
InnoDB has an oft-unused parameter innodb_concurrency_tickets that seems widely misunderstood. From the docs: “The number of threads that can enter InnoDB concurrently is determined by the...
View ArticleHere’s my favorite secret MySQL 5.6 feature. What’s yours?
MySQL 5.6 has a great many new features, including, but certainly not limited to a number of performance improvements. However, besides the widely talked-about features such as InnoDB support for full...
View ArticlePercona XtraBackup – A workaround to the failed assertion bug
I recently conducted a test backup of my “master-slave” setup in my VirtualBox as I was migrating from Percona Server 5.6.12 to version 5.6.13-rel61.0 with Percona XtraBackup v2.2.0 rev. 4885. However,...
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Percona Server 5.6.15-63.0 is now available
Percona Server version 5.6.15-63.0Percona is glad to announce the release of Percona Server 5.6.15-63.0 on December 19th, 2013 (Downloads are available here and from the Percona Software...
View ArticleProfiling MySQL Memory Usage With Valgrind Massif
There are times where you need to know exactly how much memory the mysqld server (or any other program) is using, where (i.e. for what function) it was allocated, how it got there (a backtrace,...
View ArticleInnoDB Full-text Search in MySQL 5.6 (part 1)
I’ve never been a very big fan of MyISAM; I would argue that in most situations, any possible advantages to using MyISAM are far outweighed by the potential disadvantages and the strengths of InnoDB....
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Percona Server for MySQL 5.5.30-30.2 now available
Percona Server for MySQL version 5.5.30-30.2Percona is glad to announce the release of Percona Server for MySQL 5.5.30-30.2 on April 10, 2013 (Downloads are available here and from the Percona Software...
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Percona Server 5.5.30-30.2 rerelease fixes non-restart issue
In our last 5.5 series release of Percona Server, we included a regression in the RPM packaging that prevented the server from restarting following an upgrade — instead, the server would remain stopped...
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