I had a lot of questions on my MySQL Indexing: Best Practices Webinar (both recording and slides are available now) We had lots of questions. I did not have time to answer some and others are better answered in writing anyway. Q: One developer on our team wants to replace longish (25-30) indexed varchars with [...]
SQL Injection Questions Followup
July 26, 2012 By 2 Comments
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 [...]
ALTER TABLE: Creating Index by Sort and Buffer Pool Size
June 27, 2012 By 4 Comments
Today I was looking at the ALTER TABLE performance with fast index creation and without it with different buffer pool sizes. Results are pretty interesting. I used modified Sysbench table for these tests because original table as initially created only has index on column K which initially contains only zeros, which means index is very [...]
Building Indexes by Sorting In Innodb (AKA Fast Index Creation)
June 19, 2012 By 2 Comments
Innodb can indexes built by sort since Innodb Plugin for MySQL 5.1 which is a lot faster than building them through insertion, especially for tables much larger than memory and large uncorrelated indexes you might be looking at 10x difference or more. Yet for some reason Innodb team has chosen to use very small (just [...]
Percona Live MySQL Conference 2012 Prize Winners and Percona Live New York 2012
May 23, 2012 By Leave a Comment
I’m pleased to announce a variety of prize winners associated with the Percona Live MySQL Conference and Expo 2012. The following people won prizes in the pre-conference registration promotion: Kindle Fire Winners: Tatiana B., Etsy, United States Tom H., Cloudtree, United States Loren A., HearSayCorp, United States High Performance MySQL 3rd Edition Book Winners: Marcus [...]
Benchmarking single-row insert performance on Amazon EC2
May 16, 2012 By 17 Comments
I have been working for a customer benchmarking insert performance on Amazon EC2, and I have some interesting results that I wanted to share. I used a nice and effective tool iiBench which has been developed by Tokutek. Though the “1 billion row insert challenge” for which this tool was originally built is long over, [...]
New distribution of random generator for sysbench – Zipf
May 9, 2012 By 3 Comments
Sysbench has three distribution for random numbers: uniform, special and gaussian. I mostly use uniform and special, and I feel that both do not fully reflect my needs when I run benchmarks. Uniform is stupidly simple: for a table with 1 mln rows, each row gets equal amount of hits. This barely reflects real system, [...]
Congratulations to Percona Live Ticket Winners!
March 29, 2012 By 2 Comments
It’s taken a little while to sort out the contest logistics, but we’re ready now, so I want to congratulate our three first-prize winners to the Percona Live MySQL Conference and Expo: David Juntgen Jeff Hansen Domenick Petrella For helping us to promote the conference, they’re receiving full conference passes, including tutorials. I hope you [...]
Index Condition Pushdown in MySQL 5.6 and MariaDB 5.5 and its performance impact
March 12, 2012 By 12 Comments
I have been working with Peter in preparation for the talk comparing the optimizer enhancements in MySQL 5.6 and MariaDB 5.5. We are taking a look at and benchmarking optimizer enhancements one by one. So in the same way this blog post is aimed at a new optimizer enhancement Index Condition Pushdown (ICP). Its available [...]
Announcing Percona XtraBackup 2.0 Beta 1
February 8, 2012 By 11 Comments
Percona is glad to announce our first Beta release of what will become Percona XtraBackup 2.0. We’re releasing this beta to encourage testing of our upcoming 2.0 release of Percona XtraBackup. Since this is a beta release, you should not rely on it for production workloads – use the stable 1.6 series of Percona XtraBackup [...]
