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Multiple purge threads in Percona Server 5.1.56 and MySQL 5.6.2
Part of the InnoDB duties, being an MVCC-implementing storage engine, is to get rid of–purge–the old versions of the records as they become obsolete. In MySQL 5.1 this is done by the master InnoDB...
View ArticleDynamic row format for MEMORY tables
The latest Percona Server release has one new feature: now MEMORY tables can have BLOB and TEXT columns, and VARCHAR columns will not waste space due to implicit extension to CHAR.The lack of these...
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Helgrinding MySQL with InnoDB for Synchronisation Errors, Fun and Profit
It is no secret that bugs related to multithreading–deadlocks, data races, starvations etc–have a big impact on application’s stability and are at the same time hard to find due to their...
View ArticleAnnouncing Percona Server 5.5.19-24.0
Percona is glad to announce the release of Percona Server 5.5.19-24.0 on January 13th, 2012 (Downloads are available here and from the Percona Software Repositories).Based on MySQL 5.5.19, including...
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A technical WebScaleSQL review and comparison with Percona Server
The recent WebScaleSQL announcement has made quite a splash in the MySQL community over the last few weeks, and with a good reason. The collaboration between the major MySQL-at-scale users to develop a...
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Percona Server 5.7 performance improvements
In this blog post, we’ll be discussing Percona Server 5.7 performance improvements. Starting from the Percona Server 5.6 release, we’ve introduced several significant changes that help address...
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MySQL 5.7: initial flushing analysis and why Performance Schema data is...
In this post, we’ll examine why in an initial flushing analysis we find that Performance Schema data is incomplete. Having shown the performance impact of Percona Server 5.7 patches, we can now discuss...
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Percona Server 5.7: multi-threaded LRU flushing
In this blog post, we’ll discuss how to use multi-threaded LRU flushing to prevent bottlenecks in MySQL. In the previous post, we saw that InnoDB 5.7 performs a lot of single-page LRU flushes, which in...
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Percona Server 5.7 parallel doublewrite
In this blog post, we’ll discuss the ins and outs of Percona Server 5.7 parallel doublewrite. After implementing parallel LRU flushing as described in the previous post, we went back to benchmarking....
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