As you likely have seen Sun has posted the new SpecJAppServer Results More information from Tom Daly can be found here These results are quite interesting for me as I worked on some of the previous SpecJAppServer Benchmarks several years ago while being employed by MySQL. These are great results, plus they can be relevant [...]
Announce: Front End Performance Optimization
October 10, 2008 By 8 Comments
I guess many of you know us and so our company for MySQL related services. It is true this is majority of our business at this point but it is far from everything. Our goal in reality is to help people to build and operate quality systems, typically web sites, which means we help customers [...]
Web Site Optimization: FrontEnd and BackEnd
June 26, 2008 By 12 Comments
I spent Monday and Tuesday this week on Velocity Conference It was quite interesting event worth attending and it was very good to see the problems in this are going beyond Apache, PHP, Memcache and MySQL. A lot of talks on this conference was focusing on what is called “FrontEnd”. The meaning of Frontend is [...]
Working with many files and file system fragmentation
March 18, 2008 By 11 Comments
Working on performance optimization project (not directly MySQL related) we did a test – creating 100 files writing 4K in the random file for some time and when checking the read speed on the files we end up with, compared to just writing the file sequentially and reading it back. The performance difference was huge [...]
MySQL: Data Storage or Data Processing
November 18, 2007 By 9 Comments
I was thinking today of how people tend to use MySQL in modern applications and it stroke me in many cases MySQL is not used to process the data, at least not on the large scale – instead it is used for data storage and light duty data retrieval. Even in this case however the [...]
Innodb Performance Optimization Basics
November 1, 2007 By 75 Comments
Interviewing people for our Job Openings I like to ask them a basic question – if you have a server with 16GB of RAM which will be dedicated for MySQL with large Innodb database using typical Web workload what settings you would adjust and interestingly enough most people fail to come up with anything reasonable. [...]
Heikki Tuuri Innodb answers – Part I
October 26, 2007 By 19 Comments
Its almost a month since I promised Heikki Tuuri to answer Innodb Questions. Heikki is a busy man so I got answers to only some of the questions but as people still poking me about this I decided to publish the answers I have so far. Plus we may get some interesting follow up questions [...]
UNION vs UNION ALL Performance
October 5, 2007 By 15 Comments
When I was comparing performance of UNION vs MySQL 5.0 index merge algorithm Sinisa pointed out I should be using UNION ALL instead of simple UNION in my benchmarks, and he was right. Numbers would be different but it should not change general point of having optimization of moving LIMIT inside of union clause being [...]
Possible optimization for sort_merge and UNION ORDER BY LIMIT
September 18, 2007 By 10 Comments
Every so often you need to perform sort results retrieved from MySQL when your WHERE clause goes beyound col=const values which would allow MySQL to still use second portion of the index for the order by. Ranges as well as IN lists make this optimization impossible, not even speaking about index merge optimization. Lets look [...]
Implementing efficient counters with MySQL
July 1, 2007 By 16 Comments
On many web sites you would see a counter how many time given object – blog post, forum thread, image, movie etc was viewed. This is sometimes handy feature but it can be rather expensive from performance point of view. The nasty thing with counters as they are implemented the most trivial way – they [...]
