by Morgan Tocker | Jul 7, 2009 | Insight for DBAs
It seems pretty common to find customers install DRBD for the wrong reasons. There are many pros/cons to compare DRBD to replication, but I’ve managed to cut down my spiel I give to customers to these two points: DRBD’s aim (assuming replication mode C) is...
by Baron Schwartz | Jul 1, 2009 | Insight for DBAs
For the last couple of months, we’ve been quietly developing a MySQL protocol parser for Maatkit. It isn’t an implementation of the protocol: it’s an observer of the protocol. This lets us gather queries from servers that don’t have a slow...
by Ryan Lowe | Jun 26, 2009 | Insight for DBAs
With the growing adoption of Google’s User Statistics Patch**, the need for supporting scripts has become clear. To that end, we’ve created check-unused-keys, a Perl script to provide a nicer interface than directly querying the INFORMATION_SCHEMA...
by Ryan Lowe | Mar 17, 2009 | Insight for Developers
The web is going the way of utf8. Drizzle has chosen it as the default character set, most back-ends to websites use it to store text data, and those who are still using latin1 have begun to migrate their databases to utf8. Googling for “mysql convert charset to...
by Baron Schwartz | Feb 1, 2009 | Insight for DBAs
One of my favorite MySQL configurations for high availability is master-master replication, which is just like normal master-slave replication except that you can fail over in both directions. Aside from MySQL Cluster, which is more special-purpose, this is probably...
by Aurimas Mikalauskas | Jan 19, 2009 | Insight for Developers
These days I’m working with a customer who has an application based entirely on stored routines on MySQL side. Even though I haven’t worked much with stored procedures, I though it’s going to be a piece of cake. In the end – it was, but...
by Maciej Dobrzanski | Nov 6, 2008 | Insight for DBAs
Everyone does backups. Usually it’s some nightly batch job that just dumps all MySQL tables into a text file or ordinarily copies the binary files from the data directory to a safe location. Obviously both ways involve much more complex operations than it would seem...
by Baron Schwartz | Aug 18, 2008 | Insight for DBAs
There are quite a few “tuning primers” and “my.cnf generators” and “sample my.cnf files” online. The ultimate tool for generating an optimal my.cnf is not a tool. It’s a human with many years of experience, deep knowledge of...
by Baron Schwartz | Jul 25, 2008 | Percona Events
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...
by Baron Schwartz | Jun 23, 2008 | Insight for DBAs
How many of you use the MySQL command-line client? And did you know about the pager command you can give it? It’s pretty useful. It tells MySQL to pipe the output of your commands through the specified program before displaying it to you. MySQL Command-line...
by Peter Zaitsev | May 31, 2008 | Insight for DBAs
There are some tools we commonly use doing performance review and optimization and we often ask each other where that particular stuff is located on the web or what is exactly name of the command what does that. Initially I thought creating internal Percona Wiki page,...
by Aurimas Mikalauskas | Mar 27, 2008 | Insight for DBAs
Few months ago, I wrote about a faster way to do certain table modifications online. It works well when all you want is to remove auto_increment or change ENUM values. When it comes to changes that really require table to be rebuilt – adding/dropping columns or...
by Alexey Kovyrin | Nov 26, 2007 | Insight for DBAs
As Peter mentioned in one of previous posts, we’ve done huge work developing robust strategies of InnoDB data recovery to provide our customers effective data recovery services and one of major parts of these strategies is our toolkit for InnoDB data recovery....
by Peter Zaitsev | Apr 5, 2007 | Insight for DBAs
The MySQL Master-Master replication (often in active-passive mode) is popular pattern used by many companies using MySQL for scale out. Most of the companies would have some internal scripts to handle things as automatic fallback and slave cloning but no Open Source...
by Vadim Tkachenko | Sep 9, 2006 | Insight for Developers
When I loaded GigaBytes of XMLs into mysql database with PHP script, I was thinking about PHP alternatives. Why do I need that ? 1. PHP is slow – I’m speaking about area of data processing and implementation of algorithms 2. No good cli debugger –...
by Vadim Tkachenko | Aug 18, 2006 | Benchmarks
Sysbench is benchmark developed by Alexey Kopytov (software engineer @ MySQL AB) – http://sysbench.sourceforge.net/ and I want to write a short intro about this tool as sysbench is one of software for my everyday use. For example, SUN published their Solaris vs...
by Peter Zaitsev | Jun 26, 2006 | Insight for DBAs
As we know build in full text search is currently limited only to MyISAM search engine as well as has few other limits. Today Sphinx Search plugin for MySQL was released which now provides fast and easy to use full text search solution for all storage engines. This...
by Peter Zaitsev | May 3, 2006 | Insight for DBAs
During the recent months I’ve seen few cases of customers upgrading to MySQL 5.0 and having serious performance slow downs, up to 10 times in certain cases. What was the most surprising for them is the problem was hardware and even OS specific – it could...
