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MySQL Downgrade Caveats

 | October 18, 2016 |  Posted In: MySQL

mysql downgrade

In this blog, we’ll discuss things to watch out for during a MySQL downgrade. Previously, I wrote the blog MySQL upgrade best practices. Besides upgrading your MySQL version, sometimes you need to downgrade. When it comes to downgrading MySQL, there are two types of downgrade methods supported: In-Place Downgrade: In this method, you use the existing data […]

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pmp-check-pt-table-checksum Percona Monitoring Plugin

 | September 14, 2016 |  Posted In: MySQL


Recently, I worked on a customer case where the customer needed to monitor the checksum via Nagios monitoring. The pmp-check-pt-table-checksum plugin from Percona Monitoring Plugins for MySQL achieves this goal. I thought it was worth a blogpost. pmp-check-pt-table-checksum alerts you when the pt-table-checksum tool from Percona Toolkit finds data drifts on a replication slave. pmp-checksum-pt-table-checksum monitors data differences on the slave from […]

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MySQL “Got an error reading communication packet” errors

 | May 16, 2016 |  Posted In: MySQL

Galera Error Failed to Report Last Committed

In this blog post, we’ll discuss the possible reasons for MySQL “Got an error reading communication packet” errors, and how to address them. In Percona’s managed services, we often receive customer questions on communication failure errors – where customers are faced with intermittent “Got an error reading communication packets” messages. I thought this topic deserved […]

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MySQL replication primer with pt-table-checksum / pt-table-sync, part 2

 | March 17, 2016 |  Posted In: MySQL


This is the second and last tutorial blog post on how to use pt-table-checksum / pt-table-sync tools for MySQL replication. In the first post, I showed you how to use the pt-table-checksum  / pt-table-sync  tools in a typical MySQL replication setup. In this post, we’ll discuss MySQL replication for more advanced topologies. I will show you how to […]

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 | November 4, 2015 |  Posted In: MySQL


MySQL 5.7 has a lot of enhancements and new features. I summarized this list previously in this blog post. Adding replication filters online is one of the MySQL 5.7 features described in this manual. However, I will describe and summarize a few examples in this blog post. Filtering replication events is also known as Partial Replication. […]

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MySQL 5.7 key features

 | May 27, 2015 |  Posted In: InnoDB, MySQL, Percona MySQL Support

The other day I was discussing new features of MySQL 5.7 with a Percona Support customer. After that conversation, I thought it would be a good idea to compile list of important features of MySQL 5.7. The latest MySQL 5.7.6 release candidate (RC) is out and is packed with nice features. Here’s a list of […]

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3 handy tools to remove problematic MySQL processes

 | February 27, 2015 |  Posted In: Insight for DBAs, MySQL, Percona Server

DBAs often encounter situations where they need to kill queries to ensure there are no long-running queries on a MySQL server that would impact performance. Long-running queries can be the result of many factors. Fortunately, Percona Server contains some handy tools to remove problematic MySQL processes. I will highlight all of the tools via some […]

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