Automation: A case for synchronous replication
Just yesterday I wrote about math of automatic failover today I’ll share my thoughts about what makes MySQL failover different from many other components and why asynchronous nature of standard...
View ArticlePercona XtraDB Cluster – installation and setup webinar follow up Q&A
Thanks for all, who attended my webinar, I got many questions and I wanted to take this opportunity to answer them.Q: Even ntp has a delay of 0.3-0.4 between servers does that mean a 0.25 as from logs...
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Investigating MySQL Replication Latency in Percona XtraDB Cluster
Investigating MySQL Replication Latency in Percona XtraDB ClusterI was curious to check how Percona XtraDB Cluster behaves when it comes to MySQL replication latency — or better yet, call it data...
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Percona XtraDB Cluster 5.5.30-23.7.4 for MySQL now available
Percona is glad to announce the release of Percona XtraDB Cluster 5.5.30-23.7.4 for MySQL on April 17, 2013. Binaries are available from the downloads area or from our software repositories.New...
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MySQL and the SSB – Part 2 – MyISAM vs InnoDB low concurrency
This blog post is part two in what is now a continuing series on the Star Schema Benchmark.In my previous blog post I compared MySQL 5.5.30 to MySQL 5.6.10, both with default settings using only the...
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Percona XtraDB Cluster operations MySQL Webinar follow-up questions anwsered
Thanks to all who attended my PXC Operations webinar last week. If you missed it you can watch the video here.I wanted to take some time to answer the questions I didn’t get to during the broadcast.Is...
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Checking B+tree leaf nodes list consistency in InnoDB
If we have InnoDB pages there are two ways to learn how many records they contain:PAGE_N_RECS field in the page headerCount records while walking over the list of records from infimum to supremumIn...
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InnoDB performance optimization basics (redux)
I recently stumbled upon a post that Peter Zaitsev published back in 2007 titled “Innodb Performance Optimization Basics.” It’s a great post and reading it inspired me to examine what’s changed in the...
View ArticleHigh-availability options for MySQL, October 2013 update
table { border-collapse:collapse; } table, td, th { border:1px solid black; padding:1px; vertical-align:top; font-size:9px; } th { background-color:lightgray; } ul { padding:5px; margin:15px; }The...
View ArticlePercona XtraDB Cluster 5.5.34-23.7.6 is now available
Percona is glad to announce the release of Percona XtraDB Cluster 5.5.34-23.7.6 on November 4, 2013. Binaries are available from the downloads area or from our software repositories.Bugs Fixed:Fixed...
View ArticleIntroducing backup locks in Percona Server
TL;DR version: The backup locks feature introduced in Percona Server 5.6.16-64.0 is a lightweight alternative to FLUSH TABLES WITH READ LOCK and can be used to take both physical and logical backups...
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Innodb redo log archiving
Percona Server 5.6.11-60.3 introduces a new “log archiving” feature. Percona XtraBackup 2.1.5 supports “apply archived logs.” What does it mean and how it can be used?Percona products propose three...
View ArticleA schema change inconsistency with Galera Cluster for MySQL
I recently worked on a case where one node of a Galera cluster had its schema desynchronized with the other nodes. And that was although Total Order Isolation method was in effect to perform the schema...
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MySQL and the SSB – Part 2 – MyISAM vs InnoDB low concurrency
This blog post is part two in what is now a continuing series on the Star Schema Benchmark.In my previous blog post I compared MySQL 5.5.30 to MySQL 5.6.10, both with default settings using only the...
View ArticleClik here to view.
Percona XtraDB Cluster operations MySQL Webinar follow-up questions anwsered
Thanks to all who attended my PXC Operations webinar last week. If you missed it you can watch the video here.I wanted to take some time to answer the questions I didn’t get to during the broadcast.Is...
View ArticleClik here to view.
Checking B+tree leaf nodes list consistency in InnoDB
If we have InnoDB pages there are two ways to learn how many records they contain:PAGE_N_RECS field in the page headerCount records while walking over the list of records from infimum to supremumIn...
View ArticleClik here to view.
InnoDB performance optimization basics (redux)
I recently stumbled upon a post that Peter Zaitsev published back in 2007 titled “Innodb Performance Optimization Basics.” It’s a great post and reading it inspired me to examine what’s changed in the...
View ArticleHigh-availability options for MySQL, October 2013 update
table { border-collapse:collapse; } table, td, th { border:1px solid black; padding:1px; vertical-align:top; font-size:9px; } th { background-color:lightgray; } ul { padding:5px; margin:15px; }The...
View ArticlePercona XtraDB Cluster 5.5.34-23.7.6 is now available
Percona is glad to announce the release of Percona XtraDB Cluster 5.5.34-23.7.6 on November 4, 2013. Binaries are available from the downloads area or from our software repositories.Bugs Fixed:Fixed...
View ArticleIntroducing backup locks in Percona Server
TL;DR version: The backup locks feature introduced in Percona Server 5.6.16-64.0 is a lightweight alternative to FLUSH TABLES WITH READ LOCK and can be used to take both physical and logical backups...
View Article