May 18, 2013

Amazon Web Services and HP Keynotes at Percona Live MySQL Conference and Expo

February 14, 2013 By 1 Comment

We are very pleased to announce the addition of HP and Amazon Web Services as keynote speakers for the Percona Live MySQL Conference and Expo which is April 22-25 in Santa Clara, California. Amazon Web Services is sending Simone Brunozzi, Senior Technology Evangelist, who will speak on “Databases in the Cloud: Present and Future.” HP [...]

Filed Under: Events and Announcements, MySQL, Percona Live

Feature preview: Compact backups in Percona XtraBackup

January 29, 2013 By 11 Comments

We continue to improve Percona XtraBackup, and today I would like to give a preview for one feature which comes in next Percona XtraBackup 2.1 release. This feature is “Compact backups”, and let me explain what it does. As you may know InnoDB PK (Primary Key) contains all data, and all secondary indexes are only [...]

Filed Under: MySQL, Percona Software Tagged With: ,

MySQL 5.6: Improvements in the Nutshell

January 27, 2013 By 16 Comments

Preparing for my talk for Percona MySQL University in Raleigh,NC, Tuesday 29th of January I have created the outline of improvements available in MySQL 5.6 which I thought was worth sharing to give a feel for how massive work have been done for this release in variety of areas. I’m sure the list is not [...]

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

Sphinx search performance optimization: multi-threaded search

January 16, 2013 By 6 Comments

Queries in MySQL, Sphinx and many other database or search engines are typically single-threaded. That is when you issue a single query on your brand new r910 with 32 CPU cores and 16 disks, the maximum that is going to be used to process this query at any given point is 1 CPU core and [...]

Filed Under: MySQL Tagged With: , , ,

Sphinx search performance optimization: attribute-based filters

January 15, 2013 By 9 Comments

One of the most common causes of a poor Sphinx search performance I find our customers face is misuse of search filters. In this article I will cover how Sphinx attributes (which are normally used for filtering) work, when they are a good idea to use and what to do when they are not, but [...]

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

How does MySQL Replication really work?

January 9, 2013 By 9 Comments

While we do have many blog posts on replication on our blog, such as on replication being single-threaded, on semi-synchronous replication or on estimating replication capacity, I don’t think we have one that covers the very basics of how MySQL replication really works on the high level. Or it’s been so long ago I can’t [...]

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

Is there room for more MySQL IO Optimization?

January 3, 2013 By 11 Comments

I prefer to run MySQL with innodb_flush_method=O_DIRECT in most cases – it makes sure there is no overhead of double buffering and I can save the limited amount of file system cache I would normally have on database server for those things which need to be cached — system files, binary log, FRM files, MySQL [...]

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

Percona Toolkit Webinar followup Q&A

December 19, 2012 By 1 Comment

First, a thank you to everyone who attended the webinar Today, I appreciate your time and nice comments. As promised, here are answers to questions that couldn’t be answered during the talk:   Q: How do you install the tools? The manual has full details, but it’s important to know that the latest release for [...]

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

Percona XtraDB Cluster (PXC): what about GRA_*.log files ?

December 19, 2012 By Leave a Comment

How easy is it to identify and debug Percona XtraDB Cluster replication problem ? If you are using PXC, you may have already seen in your datadirectory several log files starting with GRA_ Those files correspond to a replication failure. That means the slave thread was not able to apply one transaction. For each of [...]

Filed Under: MySQL, Percona Software, XtraDB Cluster

The Optimization That (Often) Isn’t: Index Merge Intersection

December 14, 2012 By 6 Comments

Prior to version 5.0, MySQL could only use one index per table in a given query without any exceptions; folks that didn’t understand this limitation would often have tables with lots of single-column indexes on columns which commonly appeared in their WHERE clauses, and they’d wonder why the EXPLAIN plan for a given SELECT would [...]

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