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MySQL 5.5 lock_wait_timeout: patience is a virtue, and a locked server

 | February 28, 2013 |  Posted In: Insight for DBAs, Insight for Developers, MySQL

Like Ovais said in Implications of Metadata Locking Changes in MySQL 5.5, the hot topic these days is MySQL 5.6, but there was an important metadata locking change in MySQL 5.5.  As I began to dig into the Percona Toolkit bug he reported concerning this change apropos pt-online-schema-change, I discovered something about lock_wait_timeout that shocked me.  From the […]

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MongoDB + Fractal Tree Indexes = High Compression

 | February 27, 2013 |  Posted In: Tokutek, TokuView

One doesn’t have to look far to see that there is strong interest in MongoDB compression. MongoDB has an open ticket from 2009 titled “Option to Store Data Compressed” with Fix Version/s planned but not scheduled. The ticket has a lot of comments, mostly from MongoDB users explaining their use-cases for the feature. For example, […]

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MySQL optimizer: ANALYZE TABLE and Waiting for table flush

 | February 27, 2013 |  Posted In: MySQL

The MySQL optimizer makes the decision of what execution plan to use based on the information provided by the storage engines. That information is not accurate in some engines like InnoDB and they are based in statistics calculations therefore sometimes some tune is needed. In InnoDB these statistics are calculated automatically, check the following blog […]

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Announcing Percona Server for MySQL version 5.5.29-30.0

 | February 26, 2013 |  Posted In: Events and Announcements, MySQL, Percona Software

Percona is glad to announce the release of Percona Server for MySQL version 5.5.29-30.0 on February 26th, 2013 (Downloads are available here and from the Percona Software Repositories). Based on MySQL 5.5.29, including all the bug fixes in it, Percona Server 5.5.29-30.0 is now the current stable release in the 5.5 series. All of Percona‘s software is open-source and free, all the details […]

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Percona Server on the Raspberry Pi: Your own MySQL Database Server for Under $80

 | February 25, 2013 |  Posted In: Hardware and Storage, Insight for DBAs, Insight for Developers, MySQL

There are many reasons for wanting a small MySQL database server: You’re a uni student who wants to learn the SQL language better and needs a mini-testbox You’re a Windows user who wants to play around with Percona Server on Linux You’re a corporate application developer who wants a small SQL development & test box […]

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Percona Welcomes MySQL 5.6!

 | February 25, 2013 |  Posted In: Insight for DBAs, Insight for Developers, MySQL, Percona Software, Percona Toolkit

MySQL 5.6 was made generally available as a production-ready solution earlier this month. This release comes about 2 years after MySQL 5.5 was released, but MySQL 5.6 contains improvements started long before that – for example, work on the Innodb Full Text Search project was started over 6 years ago, in addition with many optimizer […]

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How to use a smartphone for two-factor authentication with Percona Server for MySQL

 | February 24, 2013 |  Posted In: MySQL, Percona Software

In this post I will describe a non-trivial way to authenticate users in Percona Sever for MySQL. Percona Server comes with PAM authentication plugin, which allows you to do a lot of cool things, such as: OS authentication, LDAP authentication, even RSA Secure Server authentication (which is useful if you are required a PCI-compliance), and […]

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