November 23, 2014

Recovering temporal types in MySQL 5.6: TIME, TIMESTAMP and DATETIME

MySQL 5.6 introduces a new feature – microseconds resolution in some temporal types. As of 5.6.4 TIME, TIMESTAMP and DATETIME can have a fractional part. To create a field with subseconds you can specify precision in brackets: TIME(3), DATETIME(6) etc. Obviously, the new feature requires the format change. All three types may now have a […]

Summertime Percona MySQL training update

Now that June has arrived it is time to plan what you will do over the summer months. In addition to your summer vacation plans, give thought to MySQL training for you and your team. Summer is the time to brush up on those critical skills needed to ensure all systems are ready for the holiday […]

Avoiding MySQL ALTER table downtime

MySQL table alterations can interrupt production traffic causing bad customer experience or in worst cases, loss of revenue. Not all DBAs, developers, syadmins know MySQL well enough to avoid this pitfall. DBAs usually encounter these kinds of production interruptions when working with upgrade scripts that touch both application and database or if an inexperienced admin/dev […]

‘Bash Bug’ giving you Shellshock? CVE-2014-6271 update

The media train is in full steam today over the the CVE-2014-6271 programming flaw, better known as the “Bash Bug” or “Shellshock” – the original problem was disclosed on Wednesday via this post. Firstly this issue exploits bash environment variables in order to execute arbitrary commands; a simple check for this per the Red Hat […]

Measuring failover time for ScaleArc load balancer

ScaleArc hired Percona to benchmark failover times for the ScaleArc database traffic management software in different scenarios. We tested failover times for various clustered setups, where ScaleArc itself was the load balancer for the cluster. These tests complement other performance tests on the ScaleArc software – sysbench testing for latency and testing for WordPress acceleration. […]

TIMESTAMP Columns, Amazon RDS 5.6, and You

This comes from an issue that I worked on recently, wherein a customer reported that their application was working fine under stock MySQL 5.6 but producing erroneous results when they tried running it on Amazon RDS 5.6. They had a table which, on the working server, contained two TIMESTAMP columns, one which defaulted to CURRENT_TIMESTAMP […]

DBA 101: Sometimes forgotten functionality in the MySQL client

The MySQL client has some functionalities some of us never use. Why would you use them and what is the added value of this? Every DBA and developer has had a moment when he or she needs to connect to a MySQL database using the command line tool. Therefore I’ve written down an explanation of […]

Percona Cloud Tools January 2014 status update

Percona Cloud Tools, a new service currently in beta, applies Percona’s MySQL expertise to identify the best opportunities for application performance improvement. The first component of Percona Cloud Tools that’s now available is Query Analytics. Based on pt-query-digest, Query Analytics enables DBAs and application developers to analyze MySQL queries over long periods of time and […]

Percona XtraDB Cluster 5.6.15-25.2 first Release Candidate is now available

Percona is glad to announce the first RC release of Percona XtraDB Cluster 5.6 on December 18th, 2013. Binaries are available from downloads area or from our software repositories. Based on Percona Server 5.6.15-63.0 including all the bug fixes in it, Galera Replicator 3.2 and on Codership wsrep API 5.6.15-25.2 is now the first RELEASE […]

High-availability options for MySQL, October 2013 update

The technologies allowing to build highly-available (HA) MySQL solutions are in constant evolution and they cover very different needs and use cases. In order to help people choose the best HA solution for their needs, we decided, Jay Janssen and I, to publish, on a regular basis (hopefully, this is the first), an update on […]