August 2, 2014

dbqp and Xtrabackup testing

So I’m back from the Percona dev team’s recent meeting.  While there, we spent a fair bit of time discussing Xtrabackup development.  One of our challenges is that as we add richer features to the tool, we need equivalent testing capabilities.  However, it seems a constant in the MySQL world that available QA tools often […]

Percona Server 5.1.58-12.9

Percona is glad to announce the release of Percona Server 5.1.58-12.9 on August 12, 2011 (Downloads are available here and from the Percona Software Repositories). Based on MySQL 5.1.58, including all the bug fixes in it, Percona Server 5.1.58-12.9 is now the current stable release in the 5.1 series. All of Percona’s software is open-source and free, all […]

Percona Server 5.5.14-20.5

Percona is glad to announce the release of Percona Server 5.5.14-20.5 on August 12, 2011 (Downloads are available here and from the Percona Software Repositories). Based on MySQL 5.5.14, including all the bug fixes in it, Percona Server 5.5.14-20.5 is now the current stable release in the 5.5 series. All of Percona’s software is open-source and free, all […]

The two even more fundamental performance metrics

In a recent blog post, I wrote about four fundamental metrics for system performance analysis. These are throughput, residence time, “weighted time” (the sum of all residence times in the observation period — the terminology is mine for lack of a better name), and concurrency. I derived all of these metrics from two “even more […]

Percona Server 5.1.56-12.7

Percona Server version 5.1.56-12.7 is now available for download. It is based on MySQL 5.1.56 and is the current stable release in the 5.1 series.

Virtualization and IO Modes = Extra Complexity

It has taken a years to get a proper integration between operating system kernel, device driver and hardware to get behavior with caches and IO modes correctly. I remember us having a lot of troubles with fsync() not flushing hard drive write cache and so potential hard drives can be lost on power failure. Happily […]

Percona Server and XtraBackup weekly news, February 5th

I decided to try a series of blog posts keeping people informed about what’s happening in Percona Server and Percona XtraBackup once a week. I’ll try to digest things, but it turns out to be hard — I want to provide details and links for everything, but then it isn’t really a digest anymore, so […]

xtrabackup-0.9.5rc

Dear Community, As of today release 0.9.5rc is available. In this release there are following changes: Changelog: Option –no-lock is added to innobackupex-1.5.1. Use it only while ALL your tables are InnoDB and you DO NOT CARE about binary log position of backup XtraBackup is ported for InnoDB Plugin 1.0.4. Barracuda file format as well […]

PHP vs. BIGINT vs. float conversion caveat

Sometimes you need to work with big numbers in PHP (gulp). For example, sometimes 32-bit identifiers are not enough and you have to use BIGINT 64-bit ids; e.g. if you are encoding additional information like the server ID into high bits of the ID. I had already written about the mess that 64-bit integers are […]

Choosing innodb_buffer_pool_size

My last post about Innodb Performance Optimization got a lot of comments choosing proper innodb_buffer_pool_size and indeed I oversimplified things a bit too much, so let me write a bit better description. Innodb Buffer Pool is by far the most important option for Innodb Performance and it must be set correctly. I’ve seen a lot […]