May 26, 2013

Experiences with the McAfee MySQL Audit Plugin

May 23, 2013 By 2 Comments

I recently had to do some customer work involving the McAfee MySQL Audit Plugin and would like to share my experience in this post. Auditing user activity in MySQL  has traditionally been challenging. Most data can be obtained from the slow or general log, but this involves a lot of data you don’t need too, and [...]

Filed Under: Insight for DBAs, MySQL Tagged With: ,

10 years of MySQL User Conferences

April 11, 2013 By 6 Comments

In preparing for this month’s Percona Live MySQL Conference and Expo, I’ve been reminiscing about the annual MySQL User Conference’s history – the 9 times it previously took place in its various reincarnations – and there are a lot of good things, fun things to remember. 2003 was the year that marked the first MySQL user conference [...]

Filed Under: Events and Announcements, Insight for DBAs, Insight for Developers, MySQL, Percona Live Tagged With: , , ,

MySQL 5.6 – InnoDB Memcached Plugin as a caching layer

March 29, 2013 By 10 Comments

A common practice to offload traffic from MySQL 5.6 is to use a caching layer to store expensive result sets or objects.  Some typical use cases include: Complicated query result set (search results, recent users, recent posts, etc) Full page output (relatively static pages) Full objects (user or cart object built from several queries) Infrequently [...]

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Announcing Percona Server for MySQL 5.1.68 -14.5

March 15, 2013 By Leave a Comment

Percona is glad to announce the release of Percona Server for MySQL 5.1.68 -14.5 on March 15, 2013 (Downloads are available here and from the Percona Software Repositories). Based on MySQL 5.1.68, including all the bug fixes in it, Percona Server 5.1.68 -14.5 is now the current stable release in the 5.1 series. All of Percona‘s software is open source and free, all [...]

Filed Under: MySQL, Percona Software Tagged With: , ,

InnoDB Full-text Search in MySQL 5.6 (part 1)

February 26, 2013 By 1 Comment

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. However, up until MySQL 5.6, MyISAM was the only storage engine with support for full-text search (FTS). And I’ve encountered many [...]

Filed Under: Insight for DBAs, Insight for Developers, MySQL Tagged With: , , , , ,

Realtime stats to pay attention to in Percona XtraDB Cluster and Galera

November 26, 2012 By 4 Comments

I learn more and more about Galera every day.  As I learn more, I try to keep my myq_gadgets toolkit up to date with what I consider is important to keep any eye on on a PXC node.  In that spirit, I just today pushed some changes to the ‘wsrep’ report, and I thought I’d go over [...]

Filed Under: MySQL, XtraDB Cluster

Concatenating MyISAM files

November 19, 2012 By 5 Comments

Recently, I found myself involved in the migration of a large read-only InnoDB database to MyISAM (eventually packed). The only issue was that for one of the table, we were talking of 5 TB of data, 23B rows. Not small… I calculated that with something like insert into MyISAM_table… select * from Innodb_table… would take [...]

Filed Under: MySQL

Logging Foreign Key errors

September 27, 2012 By Leave a Comment

In the last blog post I wrote about how to log deadlock errors using Percona Toolkit. Foreign key errors have the same problems. InnoDB only logs the last error in the output of SHOW ENGINE INNODB STATUS, so we need another similar tool in order to have historical data. pt-fk-error-logger This is a tool very [...]

Filed Under: MySQL

The Math of Automated Failover

September 18, 2012 By 9 Comments

There are number of people recently blogging about MySQL automated failover, based on production incident which GitHub disclosed. Here is my take on it. When we look at systems providing high availability we can identify 2 cases of system breaking down. First is when the system itself has a bug or limitations which does not [...]

Filed Under: Insight for DBAs, MySQL

Sell-an-Elephant-to-your-Boss-HOWTO

August 28, 2012 By 3 Comments

Spoiler alert: If your boss does not need an elephant, he is definitely NOT going to buy one from you. If he will, he will regret it and eventually you will too. I must appologize to the reader who was expecting to find an advice on selling useless goods to his boss. While I do [...]

Filed Under: Insight for DBAs, Insight for Developers Tagged With: ,
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