May 22, 2013

Why use encrypted backup with Percona XtraBackup 2.1 for MySQL?

April 10, 2013 By 2 Comments

We just released our first alpha of Percona XtraBackup 2.1 for MySQL and with it we included the ability to encrypt backups on the fly (full documentation here). This feature is different than simply piping the backup stream through the openssl or gpg binaries, which is what some people have used in the past. A big [...]

Filed Under: Cloud and NoSQL, Insight for DBAs, MySQL, Percona Software 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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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: , , ,

Benchmarking single-row insert performance on Amazon EC2

May 16, 2012 By 17 Comments

I have been working for a customer benchmarking insert performance on Amazon EC2, and I have some interesting results that I wanted to share. I used a nice and effective tool iiBench which has been developed by Tokutek. Though the “1 billion row insert challenge” for which this tool was originally built is long over, [...]

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

Announcing Percona XtraBackup 2.0.0 GA

April 4, 2012 By 11 Comments

I’m really excited to today announce the first GA (Generally Available; i.e. stable) release of Percona XtraBackup 2.0. We have worked hard since our last major release on improving the reliability and user experience of Percona XtraBackup as well as adding features to make it better suited to more environments. The 2.0.0 release contains no [...]

Filed Under: MySQL

Percona Testing: Innodb crash / recovery tests available

December 21, 2011 By Leave a Comment

Not everyone may know this, but there are precious few innodb crash recovery tests available. Some folks have noticed this and asked for something to be done about it, but unfortunately, no tests have been created for the main MySQL branch. The MySQL at Facebook branch has a number of tests that are quite interesting.  [...]

Filed Under: MySQL

Helgrinding MySQL with InnoDB for Synchronisation Errors, Fun and Profit

November 24, 2011 By 2 Comments

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 nondeterministic nature.  Any tool that makes finding such bugs easier, preferably before anybody is aware of their existence, is very welcome.

Filed Under: MySQL

Side load may massively impact your MySQL Performance

November 13, 2011 By 7 Comments

When we’re looking at benchmarks we typically run some stable workload and we run it in isolation – nothing else is happening on the system. This is not however how things happen in real world when we have significant variance in the load and many things can be happening concurrently. It is very typical to [...]

Filed Under: Benchmarks, Insight for DBAs, MySQL

MySQL versions shootout

October 10, 2011 By 6 Comments

As part of work on “High Performance MySQL, 3rd edition”, Baron asked me to compare different MySQL version in some simple benchmark, but on decent hardware. So why not.

Filed Under: Benchmarks, MySQL

Getting MySQL Core file on Linux

August 26, 2011 By 1 Comment

Core file can be quite helpful to troubleshoot MySQL Crashes yet it is not always easy to get, especially with recent Linux distributions which have security features to prevent core files to be dumped by setuid processes (and MySQL Server is most commonly ran changing user from “root” to “mysql”). Before you embark on enabling [...]

Filed Under: Insight for DBAs, MySQL
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