I presented a webinar today about SQL Injection, to try to clear up some of the misconceptions that many other blogs and articles have about this security risk. You can register for the webinar even now that I’ve presented it, and you’ll be emailed a link to the recording, which will be available soon. During [...]
Find unused indexes
June 30, 2012 By Leave a Comment
I wrote one week ago about how to find duplicate indexes. This time we’ll learn how to find unused indexes to continue improving our schema and the overall performance. There are different possibilites and we’ll explore the two most common here. User Statistics from Percona Server and pt-index-usage. User Statistics User Statistics is an improvement [...]
MySQL Limitations Part 3: Subqueries
October 25, 2010 By 21 Comments
This is the third in a series on what’s seriously limiting MySQL in certain circumstances (links: part 1, 2). This post is about subqueries, which in some cases execute outside-in instead of inside-out as users expect.
The perils of InnoDB with Debian and startup scripts
January 28, 2009 By 13 Comments
Are you running MySQL on Debian or Ubuntu with InnoDB? You might want to disable /etc/mysql/debian-start. When you run /etc/init.d/mysql start it runs this script, which runs mysqlcheck, which can destroy performance. It can happen on a server with MyISAM tables, if there are enough tables, but it is far worse on InnoDB. There are [...]
What would you like to hear about on MySQL Users Conference 2008 ?
October 22, 2007 By 2 Comments
It is submission time now, with about one week left till proposal submission deadline. Both me and Vadim had submitted few talks to the Grand Jury which will make elite selection of sessions for MySQL Users Conference and we plan to submit few more. Our experience in MySQL is rather broad – we can prepare [...]
Site was down today, support and web hosting.
August 31, 2007 By 27 Comments
During last one and a half year we had pretty good track record with MySQL Performance Blog – there were times when site was slow (especially when backup was running) but I do not remember significant downtime, until today we went down for few hours. All this time the site was running on dedicated server [...]
MySQL on OSCON
July 26, 2007 By 13 Comments
Interesting enough this year people at OSCON do not show to much interest in the MySQL, and Databases for that reason. Our talk comparing performance of MySQL Storage Engines had probably 20-30 people, Monty’s talk on MySQL Source Code had about same number, and as Monty told me he never had so few people on [...]
