September 18, 2014

What I learned while migrating a customer MySQL installation to Amazon RDS

Hi, I recently had the experience of assisting with a migration of a customer MySQL installation to Amazon RDS (Relational Database Service). Amazon RDS is a great platform for hosting your MySQL installation and offers the following list of pros and cons: You can scale your CPU, IOPS, and storage space separately by using Amazon […]

Semi-Sync replication performance in MySQL 5.7.4 DMR

I was interested to hear about semi-sync replication improvements in MySQL’s 5.7.4 DMR release and decided to check it out.  I previously blogged about poor semi-sync performance and was pretty disappointed from semi-sync’s performance across WAN distances back then, particularly with many client threads. The Test The basic environment of these tests was: AWS EC2 […]

Percona Live MySQL Conference Sessions Announced

I’m very pleased to announce that the breakout session and tutorial schedules for the third annual Percona Live MySQL Conference and Expo 2014 are now online. The conference will be at The Hyatt Regency Santa Clara and Santa Clara Convention Center, April 1-4, 2014. I wish to personally thank our dedicated Conference Committee members who […]

MySQL 5.6 New Replication Features: Webinar followup Q&A

I want to thank all attendees of my webinar, “MySQL 5.6 New Replication Features: Benefits, Challenges and Limitations“. We had questions that I didn’t have the time to answer: Q: If I run on Amazon’s RDS, do I need to worry about enabling crash-safe slaves, or is that already in place? A: Crash-safe replication is […]

More on MySQL transaction descriptors optimization

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 […]

MySQL 5.6 vs MySQL 5.5 and the Star Schema Benchmark

So far most of the benchmarks posted about MySQL 5.6 use the sysbench OLTP workload.  I wanted to test a set of queries which, unlike sysbench, utilize joins.  I also wanted an easily reproducible set of data which is more rich than the simple sysbench table.  The Star Schema Benchmark (SSB) seems ideal for this. […]

How Does Semisynchronous MySQL Replication Work?

With the recent release of Percona XtraDB Cluster, I am increasingly being asked about MySQL’s semi-synchronous replication. I find that there are often a number of misconceptions about how semi-synchronous replication really works. I think it is very important to understand what guarantees you actually get with semi-synchronous replication, and what you don’t get. The […]

Ultimate MySQL variable and status reference list

I am constantly referring to the amazing MySQL manual, especially the option and variable reference table. But just as frequently, I want to look up blog posts on variables, or look for content in the Percona documentation or forums. So I present to you what is now my newest Firefox toolbar bookmark: an option and […]

Daniel Nichter and Percona join forces on Maatkit

Daniel Nichter, the author of several very useful MySQL tools, has joined with Percona to continue to improve Maatkit — the “other” toolkit we rely on daily. Daniel is a skilled Perl programmer who understands MySQL. He is in a perfect position to move the project forward on a more regular basis than I’ve been […]

MySQL should have dynamic durability settings

If you’re using Innodb tables MySQL has innodb_flush_log_at_trx_commit variable which defines how durable your transactions are. If you have high durability requirements you set it to 1 and log records are pushed directly to the disk on transaction commit. If you do not bother loosing come committed transactions you can set it to 0 and […]