August 22, 2014

The performance effects of new patches

We are going to show the effects of the new patches applied to Percona HighPerf release. As you see from the following graphs, there is significant difference to normal version when the data bigger than buffer pool (right graph shows CPU usage)

Introducing percona-patches for 5.1

Our patches for 5.0 have attracted significant interest.  You can read about SecondLife’s experience here, as well as what Flickr had to say on their blog.  The main improvements come in both performance gains and improvements to diagnostics (such as the improvements to the slow log output, and INDEX_STATISTICS). Despite having many requests to port […]

How innodb_open_files affects performance

Recently I looked at table_cache sizing which showed larger table cache does not always provides the best performance. So I decided to look at yet another similar variable – innodb_open_files which defines how many files Innodb will keep open while working in innodb_file_per_table mode. Unlike MyISAM Innodb does not have to keep open file descriptor […]

Call for opinions: Do we need MySQL 5.0 with MySQL 5.4 performance

MySQL 5.4 comes with Innodb engine which seems to have much better performance than MySQL 5.0 – this is due to locking and IO patches from Google integrated in this release (which are similar to appropriate Percona patches) as well as some unique fixes such as different innodb_thread_concurrency handling and other optimization. Should we take […]

How Percona does a MySQL Performance Audit

Our customers or prospective customers often ask us how we do a performance audit (it’s our most popular service). I thought I should write a blog post that will both answer their question, so I can just reply “read all about it at this URL” and share our methodology with readers a little bit. This […]

Percona build7 with latest patches

We made new binaries for MySQL 5.0.67 build 7 which include patches we recently announced. The -percona release includes:

and -percona-highperf release additionaly includes

You can download RPMs for RedHat / CentOS 4.x and 5.x for x86_64, binaries, sources and patches there

New patches, new builds

We made new patches, improved previous and want to announce new builds for 5.0.62, 5.0.67 and 5.1.26 versions. One of biggest changes we separated releases of 5.0 into two branches. First, just “-percona” release is more stable and contains only stable and proven on many installation patches. Second is “-percona-highperf” release, which contains experimental patches […]

Predicting Performance improvements from memory increase

One common question I guess is how much should I see performance improved in case I increase memory say from 16GB to 32GB. The benefit indeed can be very application dependent – if you have working set of say 30GB with uniform data access raising memory from 16GB to 32GB can improve performance order of […]

Userstats patches with information schema support

Recently, we added information schema support to Google’s userstats patch. There are three information schema tables added: user_statistics, table_statistics, index_statistics. One can now use select * from information_schema.user_statistics along with show user_statistics. Links: Patch for 5.0.62 Patch for 5.1.26

Percona builds with patches

As there were many requests for Debian binary packages in our announcement of Percona builds with custom patchsets, we decided to play with it and built .deb, which you can find there: http://www.mysqlperformanceblog.com/mysql/debian/ You can also add the following repositories into your sources.list: deb http://mysqlperformanceblog.com/mysql/debian/5.0/ binary-amd64/ deb http://mysqlperformanceblog.com/mysql/debian/5.0/ source/ deb http://mysqlperformanceblog.com/mysql/debian/5.1/ binary-amd64/ deb http://mysqlperformanceblog.com/mysql/debian/5.1/ source/ […]