Percona is glad to announce the release of Percona Server 5.6.27-76.0 on December 4, 2015. Download the latest version from the Percona web site or from the Percona Software Repositories.

Based on MySQL 5.6.27, including all the bug fixes in it, Percona Server 5.6.27-76.0 is the current GA release in the Percona Server 5.6 series. Percona Server is open-source and free – …

Percona is glad to announce the release of Percona Server 5.5.46-37.6 on December 4, 2015. Based on MySQL 5.5.46, including all the bug fixes in it, Percona Server 5.5.46-37.6 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 5.5.46-37.6 milestone on Launchpad. Downloads are available …

The JSON format includes the concept of array. A JSON object cant contain an attribute of array type. We have seen that we can use the MariaDB CONNECT Storage Engine provided UDFs (user defined functions) to implement dynamic columns. Let us create a table with a text column containing a a JSON string and let ...continue reading "Using JSON’s Arrays for MariaDB Dynamic Columns"

When MySQL becomes too slow (or too unstable), temptation usually is to tweak the MySQL configuration file. Indeed, it’s a good place to start. But if you ever looked at the available configuration options, you know things can get messy – MySQL now has over 450 configuration variables for your consideration, that are not classified in any way, and neither of them are included in the stock my.cnf. It’s hard to know where to start!

I’m hoping that this blog post will help you overcome the anxiety of tuning MySQL, whether you’re setting up a new server, or tuning an already running server for better performance.

Don’t do it the way rookies do it

During the last 9 years I’ve spent at Percona working as a MySQL performance and scalability consultant, I found that customers often use the trial and error approach when tuning MySQL configuration: they change a few things and check if it …

This blog post explores the syncing options for an inconsistent MySQL slave of Galera cluster node using pt-table-sync

The post Fixing inconsistency on MySQL Slave of Galera Cluster first appeared on Change Is Inevitable.

This year, Percona introduced Community Voting for Percona Live submission.  This is what you can read on the conference website:

In an effort to involve the larger community in the selection of speaking sessions for the 2016 Percona Live Data Performance Conference, we’ve implemented a community voting process. After a speaker submits a proposal we encourage sharing to the community and social

In my previous post Amazon Aurora – Looking Deeper, I promised benchmark results on Amazon Aurora.

There are already some results available from Amazon itself: https://d0.awsstatic.com/product-marketing/Aurora/RDS_Aurora_Performance_Assessment_Benchmarking_v1-2.pdf.

There are also some from Marco Tusa: http://www.tusacentral.net/joomla/index.php/mysql-blogs/175-aws-aurora-benchmarking-blast-or-splash.html.

Amazon used quite a small …

Join Alexander Rubin, Principal Consultant, Percona as he provides an overview of MySQL 5.7 features. Wednesday, December 9, 2015 10:00AM PST (GMT -08:00).

MySQL® 5.7 is a great release that has a lot to offer, especially in the areas of development and replication. It provides many new optimizer features for developers, a much more powerful GIS function, and a high performance JSON data type – allowing for a more powerful store for semi-structured data. It also features a dramatically improved Performance Schema and Parallel and Multi-Source replication – allowing you to scale much further than ever before.

Primary …

In the life of a professional MySQL DBA there comes a moment when issues are no longer trivial enough to be diagnosed using simple repros and built-in diagnostic commands. While trying to understand complex problems, you may be forced (challenged?) to look for answers at the lowest level, by analyzing the server's source code.
If you're a seasoned database engineer who killed several keyboards reporting MySQL bugs, you can stop reading now. If you're just about to begin your journey into the source, you could probably use all the help you can get so keep reading. In this short article I'll describe the MySQL server tracing feature I've been using as an aid during MySQL investigations. When investigating issues at code level, one of the first questions you will ask yourself is "where do I start?". Let's say you're attempting to debug a SHOW CREATE …

Errant transactions are a major issue when using GTID replication. Although this isn’t something new, the drawbacks are more notorious with GTID than with regular replication.

The situation where errant transaction bites you is a common DBA task: Failover. Now that tools like MHA have support for GTID replication (starting from 0.56 version), this protocol is becoming more popular, and so are the issues with errant transactions. Luckily, the fix is as simple as …