We remember when we first started auditing MySQL servers, there were very few tools available.  In one of our early big gigs, we were battling serious performance issues for a client.  At the time, tuning-primer.sh was about the only tool available that could be used to diagnose performance bottlenecks.  Fortunately, with a lot of manual interpolation of the raw data it presented, we were able to find the issue with the server and suggest how to resolve them.  For that we are very thankful.  It was a first step in analyzing MySQL status variables, minimizing the number of formulas to learn and calculate by hand.  Obviously doing it by hand takes forever!

Now fast-forward to today.  Unfortunately, not much has changed.  Many DBAs and developers are still using open source tools such as tuning-primer, mysqltuner.pl, mysqlreport, and so on.  Don’t get the wrong; those tools have …

As a MySQL support engineer, I see this so often, that I felt it could help to write a post about it.

Customers contact us to ask about replication lag – ie, a slave is very far behind the master, and not catching up. (“Very far” meaning hours behind.)

The most common reason I encounter is databases having InnoDB tables without explicit primary keys. Especially if you are using row-based replication (“RBR”), you want explicit primary keys on all your tables. Otherwise, MySQL will scan the entire table for each row that is updated. (See bug 53375 . )  Maybe I’m a relational purist, but why would you want to have tables without explicit primary keys, anyway?  (On the other, less-purist, hand, for performance reasons, sometimes a short surrogate PK may be preferred to a lengthy logical one. )

The other common reason is that the slave …

A week or two ago one of my former colleagues (at Percona) Jevin Real gave a talk titled Evolving Backups Strategy, Deploying pyxbackup at Percona Live 2015 in Amsterdam. I think Jervin raised some very good points about where MySQL backup solutions in general fall short. There are definitely a lot of tools and scripts out there that claim to do MySQL backups correctly, but don’t actually do it correctly. What I am more interested though is in measuring TwinDB against the points that Jervin highlighted to see if TwinDB falls short too.

Dependencies

We distribute TwinDB agent as a package that can be installed using the standard OS package management system. For example, using YUM on CentOS, RHEL and Amazon Linux, or using APT …

Thanks to everyone who joined us for our recent live webinar on ‘Replication Topology Changes for MySQL and MariaDB’ led by Krzysztof Książek, Senior Support Engineer at Severalnines. The replay and slides to the webinar are now available to watch and read online via the links below.

Watch the replay

Webinar: Replication Topology Changes for MySQL and MariaDB from Severalnines AB

Read the slides

Webinar slides: Replication Topology Changes for MySQL and MariaDB from …

I have released MySQL-Sandbox 3.1.01, which is the first release after the move to GitHub. While the changes are not so spectacular (it's a minor release, with mostly bug fixes), I am pleased to see that the move has started producing collaboration. Two of the changes were provided by Daniël van Eeden and Mark Leith, who have scratched some of their own itches by providing useful patches.

All in all, this period of working with GitHub has been liberating. Although Bazaar plays with the same principles of git, it lacks most of the tools and the know-how which characterizes git. Add to this that also my team has moved Tungsten Replicator …

I was thinking if my work environment would be interesting or not, but I decided ‘yes’ – because I always like reading about others work env.

I am working with Linux/UNIX for more than 15 years now, and I have tried a lot of cool tools, but at the end, I always found myself using the same apps in terminal.

I like the unix philosophy about Do One Thing and Do It Well. I never really use big, bloated software, I like to use my editor for editing files, and my git client to use git. That’s simple.

Normally I work from a mac, but I have an installed linux based backup environment too, on a remote server which can be accessed via ssh.

The basic tool for me is iTerm2. The main features I use are split pane (cmd+D vertical, cmd+shift+D horiontal) and broadcast input (cmd+shift+I). I also like that it can be switched to fullscreen with cmd+enter. In …

I was recently downloading and trying to run a MySQL docker image  which worked just fine on top of a Hyper-V based Ubuntu 14.04 LTS. Don’t worry, this is still Entity Framework Code-First migration article with Visual Studio 2015 and MySQL 5.6.27 (latest as of today). I setup a Docker MySQL Image on my Ubuntu based Docker host. I was thinking what could be a best way to test this instance out with .NET than testing it with our good friend Entity Framework Code-First migration. This is really going to hit the MySQL instance hard by creating DB on its own and creating all the Model Tables on its own with little or no involvement of MYSQL DDL /DMLs. Prerequisites : – To start using Entity Framework 6 and Visual Studio 2015 is necessary to install

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Today’s topic is about how to test Group Replication plugin in easy way, with using MySQL Sandbox
But firstly we must compile MySQL with Group Replication plugin, refer to previous topic -> Compiling Group Replication Plugin

Who did not use Sandbox before, please refer to official link and read a bit more. It is wonderful tool for installing, testing new things with MySQL. Especially if you have new MySQL release to test and want to install 3 or 5 instances, just use MySQL Sandbox and it will do this work for you.

In our condition, we have already compiled MySQL with our plugin. So we have source folder in -> /home/sh/Sandboxes/mysql-group-replication-0.5.0-dmr/BIN

…

Next November I’ll once again take the ferry to my neighbour city of Buenos Aires to enjoy two days of learning, networking, and presenting, at DataOps LA 2015, the first incarnation of what used to be the MySQL, NoSQL, Cloud Conference organized by BinLogic in Buenos Aires.

Next November I’ll once again take the ferry to my neighbour city of Buenos Aires to enjoy two days of learning, networking, and presenting, at DataOps LA 2015, the first incarnation of what used to be the MySQL, NoSQL, Cloud Conference organized by BinLogic in Buenos Aires.