Join Percona’s Jervin Real for a webinar on Thursday August 18, 2016 at 10 am PDT (UTC-7) on Preventing and Resolving MySQL Downtime.

Preventing MySQL downtime and emergencies is difficult. Often complex combinations of several things going wrong cause these emergencies. Without knowledge of the causes of emergencies, preventative proactive measures often fail to prevent further problems — no matter how sincere. This talk discusses some of the ways to prevent real production system emergencies, and suggests specific actions for:

• Application stack configuration
• MySQL server configuration
• Operating system configuration
• Troublesome server features …

Percona is pleased to announce the availability of Percona Toolkit 2.2.19.  Released August 16, 2016. Percona Toolkit is a collection of advanced command-line tools that perform a variety of MySQL server and system tasks that DBAs find too difficult or complex for to perform manually. Percona Toolkit, like all Percona software, is free and open source.

This release is the current GA (Generally Available) stable release in the 2.2 series. Downloads are available here and from the Percona Software …

Let me introduce myself, I’m Colin Charles.

Percona turns ten years old this year. To me, there is no better time to join the company as the Chief Evangelist in the CTO office.

I’ve been in the MySQL world a tad longer than Percona has, and have had the pleasure of working on MySQL at MySQL AB and Sun Microsystems. Most recently I was one of the founding team members for MariaDB Server in 2009. I watched that grow into the MariaDB Corporation (after the merger with SkySQL) and the MariaDB Foundation.

For me, it’s about the right server for the right job. Today they all support a myriad of different features and different storage engines. Each server has its own community that supports and discusses their pros and cons. This is now true for both the MySQL and MongoDB ecosystems.

I’ve always had a lot …

This blog post discusses three main methods of backing up Galera Cluster.

The post Backing Up MySQL Galera Cluster appeared first on Datavail.

The behavior of vm.swappiness was always a bit confusing for novice linux users, as setting vm.swappiness to 0 would not completely disable swapping in the system during a memory crunch. vm.swappiness would only affect the agressiveness of swapping.

Following upstream commit tried to give more control to parameter. This commit tried to avoid swapping completely when vm.swappiness is set to 0.

commit fe35004fbf9eaf67482b074a2e032abb9c89b1dd
Author: Satoru Moriya
Date: Tue May 29 15:06:47 2012 -0700
mm: avoid swapping out with swappiness==0

With above commit, setting vm.swappiness to “0” instructs the kernel not to initiate swapping until the amount of free and file-backed pages is less than the high water mark in a memory zone. In other words, it tries to reclaim as much memory that can be reclaimed, before swapping starts.
This greatly reduced the chances of swapping.

When this …

This post reveals the full Percona Live Europe 2016 schedule for Amsterdam this October 3-5.

The official The Percona Live Open Source Database Conference Europe 2016 schedule is now live, and you can find it here.

The schedule demonstrates that this conference has something for everyone! Whether your interest is in MySQL, MongoDB or other open source databases, there are talks that will interest you.

The Percona Live Open Source Database Conference is the premier event for the diverse and active open source database community, as well as businesses that develop and use open source database software. The conferences have a technical focus with an emphasis on the core topics of MySQL, …

I posted a message to the internal mailing lists at MariaDB Corporation. I have departed (I resigned) the company, but definitely not the community. Thank you all for the privilege of serving the large MariaDB Server community of users, all 12 million+ of you. See you on the mailing lists, IRC, and the developer meetings.

The Japanese have a saying, “leave when the cherry blossoms are full”.

I’ve been one of the earliest employees of this post-merge company, and was on the founding team of the MariaDB Server having been around since 2009. I didn’t make the first company meeting in Mallorca (August 2009) due to the chickenpox, but I’ve been to every one since.

We made the first stable MariaDB Server 5.1 release in February 2010. Our first Linux distribution release was in …

I had an interesting phone call from someone wanting to move from MongoDB to MySQL's new JSON Document Store. The big question was 'How do I export my Mongo data into something I can read into MySQL?"

The good news is that the folks at Mongo have given us the tools for the hard part of a simple process. For this example I am going to use some test data create previously in a database creatively named dave. The numbers are made up and I am using my name and the names of the canines residing in my home. So a quick peek at the data:

$ mongo
MongoDB shell version: 3.2.8
connecting to: test
> use dave
switched to db dave
> db.dave.find()
{ "_id" : 123, "name" : "Dave" }
{ "_id" : 456, "name" : "Jack" }
{ "_id" : 789, "name" : "Dexter" }
{ "_id" : 787, "name" : "Boo" }
> 
bye

Dumping That DataFirst use mongodump -d dave …

Vadim Tkachenko recently released  Docker images for Group Replication (thank you for that ).

As not everybody is already using Docker or just because having multiple choices is also nice (this is an OpenSource world isn’t it ?), I decided to share a Vagrant environment that you can use to evaluate Group Replication.

This environment provides also a module that can be used to deploy GR on any other environment managed by Puppet.

The repository is available on my github account: mysqlGR-vagrant

This is a quick demo on how to use it:

Tadam ! You have a MySQL Group of 3 members ready to use !

Hi all, here is a new post following the blog series on the last MySQLvGroup Replication labs release which already presented: 1) the new features; 2) most asked questions; 3) summary of behaviour and configuration changes; and 4) the performance improvements.…