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Looking deeper into InnoDB’s problem with many row versions

A few days ago I wrote about MySQL performance implications of InnoDB isolation modes and I touched briefly upon the bizarre performance regression I found with InnoDB handling a large amount of versions for a single row. Today I wanted to look a bit deeper into the problem, which I also filed as a bug. First […]

FOSDEM 2015: MySQL and Friends Community Dinner!

As you may already be aware, FOSDEM and its wonderful MySQL and Friends track are once again descending upon the campus of the ULB in Brussels, Belgium. Logically, a traditional MySQL and Friends Community Dinner must follow! Signups for that dinner, on January 31, are now available, so be sure to get your tickets before they run out. […]

Hyper-threading – how does it double CPU throughput?

The other day a customer asked me to do capacity planning for their web server farm. I was looking at the CPU graph for one of the web servers that had Hyper-threading switched ON and thought to myself: “This must be quite a misleading graph – it shows 30% CPU usage. It can’t really be […]

Percona XtraBackup 2.2.8 is now available

Percona is glad to announce the release of Percona XtraBackup 2.2.8 on January 14, 2015. Downloads are available from our download site or Percona Software Repositories. Percona XtraBackup enables MySQL backups without blocking user queries, making it ideal for companies with large data sets and mission-critical applications that cannot tolerate long periods of downtime. Offered […]

Percona Live 2015 conference sessions announced!

Today we announced the full conference sessions schedule for April’s Percona Live MySQL Conference & Expo 2015 and this year’s event, once again at the Hyatt Regency Santa Clara and Santa Clara Convention Center, looks to be the biggest yet with networking and learning opportunities for MySQL professionals and enthusiasts at all levels. Conference sessions […]

Percona Server 5.6.22-71.0 is now available

Percona is glad to announce the release of Percona Server 5.6.22-71.0 on January 12, 2015. Download the latest version from the Percona web site or from the Percona Software Repositories. Based on MySQL 5.6.22, including all the bug fixes in it, Percona Server 5.6.22-71.0 is the current GA release in the Percona Server 5.6 series. Percona Server is open-source […]

Percona Server 5.5.41-37.0 is now available

Percona is glad to announce the release of Percona Server 5.5.41-37.0 on January 9, 2015. Based on MySQL 5.5.41, including all the bug fixes in it, Percona Server 5.5.41-37.0 is now the current stable release in the 5.5 series. Percona Server is open-source and free. Details of the release can be found in the 5.5.41-37.0 […]

Managing data using open source technologies? Learn what’s hot in 2015!

Whether you’re looking at the overall MySQL ecosystem or the all-data management landscape, the choice of technologies has never been larger than it is in 2015. Having so many options is great but it also can be very hard to make a selection. I’m going to help narrow the list next week during a Webinar […]

Django with time zone support and MySQL

This is yet another story of Django web-framework with time zone support and pain dealing with python datetimes and MySQL on the backend. In other words, offset-naive vs offset-aware datetimes. Shortly, more about the problem. After reading the official documentation about the time zones, it makes clear that in order to reflect python datetime in […]

Using YUM to install specific MySQL/Percona Server versions

Sometimes it is desired to use particular software versions in production, and not necessary the latest ones. There may be several reasons for that, where I think the most common is when a new version should spend some time in testing or a staging environment before getting to production. In theory each new version is […]