Last week at Percona Live, I delivered a six-hour tutorial about Percona XtraDB Cluster (PXC) for MySQL. I actually had more material than I covered (by design), but one thing I regret we didn’t cover was Flow control. So, I thought I’d write a post covering flow control because it is important to understand. What [...]
Follow these basics when migrating to Percona XtraDB Cluster for MySQL
May 1, 2013 By 9 Comments
Galera/Percona XtraDB Cluster (PXC) for MySQL is a hot thing right now and some users jump right in without enough testing. Consequently, they’re more likely to either suffer failure or issues that prevent them from moving forward. If you are thinking of migrating your workload to Percona XtraDB Cluster, make sure to go through these [...]
Webinar: Best Practices for MySQL Scalability on May 1
April 30, 2013 By Leave a Comment
If you have not already done so, I encourage you to register for my “Best Practices for MySQL Scalability” Webinar which will take place on May 1st at 10 a.m. PST. This will be an overview presentation, led by me and providing a high-level look at the components of MySQL scalability: application architecture, MySQL version [...]
More on MySQL transaction descriptors optimization
April 26, 2013 By Leave a Comment
Since my first post on MySQL transaction descriptors optimization introduced in Percona Server 5.5.30-30.2 and a followup by Dimitri Kravchuk, we have received a large number of questions on why the benchmark results in both posts look rather different. We were curious as well, so we tried to answer that question by retrying benchmarks on [...]
Finally. How to verify if all MySQL records were recovered
April 25, 2013 By Leave a Comment
After nearly every recovery case the same question arises: How many MySQL records were recovered and how many were lost. Until now there was no way to answer the question without manual investigation. As it turned out a small change can make a big difference. There are two ways to know how many records an [...]
Percona Server 5.5.30 with TokuDB for MySQL
April 24, 2013 By 26 Comments
I was excited to see that TokuDB for MySQL from Tokutek is now open source. I believe this is a great technology and it was a significant restriction on the adoption when it was distributed only in a binary format with a proprietary license. So I went and built Percona Server 5.5.30 with TokuDB’s storage [...]
Percona Server 5.5.30-30.2 rerelease fixes non-restart issue
April 24, 2013 By Leave a Comment
In our last 5.5 series release of Percona Server, we included a regression in the RPM packaging that prevented the server from restarting following an upgrade — instead, the server would remain stopped after the upgrade was completed regardless of its state before updating. This caused some problems for some users, especially if automatic upgrading was configured [...]
High-load problems? Investigate them with ‘pt-query-digest’
April 23, 2013 By 2 Comments
I had the chance to work on an interesting case last week, and I thought I’d share what I think is a little known goodie from Percona Toolkit for MySQL called pt-query-digest. One customer was suffering from periods of high load on their database server, leading to degraded application performance, and sometimes even short moments [...]
Percona XtraBackup 2.1.0 for MySQL beta now available
April 22, 2013 By Leave a Comment
Percona is glad to announce the release of Percona XtraBackup 2.1.0 for MySQL beta on April 22, 2013. Downloads are available from our download site here. For this BETA release, we will not be making APT and YUM repositories available, just base deb and RPM packages This is an BETA quality release and is not [...]
Rotating MySQL slow logs safely
April 18, 2013 By 7 Comments
This blog post is part two of two. Like part one, published Wednesday, this is a cross-post from Groupon’s engineering blog. Thanks again to Kyle Oppenheim at Groupon. And one more reminder that I’ll be at the Percona Live MySQL Conference and Expo next week in Santa Clara, California so look for me there. You [...]
