Emergency

Yearly Archives: 2007

What did we want Interns to do

About one month ago we posted a call for interns to work with us on various MySQL Performance related things. We got good number of replies and a lot of people wondered what tasks exactly …

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MySQL Quality of old and new features

Recent couple of days our team was pointed to number of bugs in MySQL 5.0 which again seriously shakes the confidence in both MySQL Quality Control and bug fix promptness. Let me just take couple …

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Heikki Tuuri to answer your in depth Innodb questions

Have you ever had a question about Innodb internal design or behavior which is not well covered in MySQL manual ? I surely had. Now you have a great chance to have them answered ! …

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Using VIEW to reduce number of tables used

Many Open Source software solutions use database per user (or set of tables per user) which starts to cause problems if it is used on massive scale (blog hosting, forum hosting etc), resulting of hundreds …

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Innodb usability and ease of use.

It always surprised me how little Innodb team seems to think about product usability/ease of use, when it comes to settings, performance management etc. I could understand many things 5 years ago, like a lot …

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InnoDB auto-inc scalability fixed

There was long played scalability issue with InnoDB auto-increment field. For details check Bug 16979. In short words the problem is in case of insert into table with auto-increment column the special AUTO_INC table level …

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MySQL Master Class after HighLoad.RU

26th of September, just after HighLoad conference I will have full day MySQL master class. This time we will talk about Innodb Architecture and Performance Optimization and when will discuss some MySQL Performance Optimization and …

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Possible optimization for sort_merge and UNION ORDER BY LIMIT

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 …

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Using GROUP BY WITH ROLLUP for Reporting Performance Optimization

Quite typical query for reporting applications is to find top X values. If you analyze Web Site logs you would look at most popular web pages or search engine keywords which bring you most of …

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MySQL: what read_buffer_size value is optimal ?

The more I work with MySQL Performance Optimization and Optimization for other applications the better I understand I have to less believe in common sense or common sense of documentation writers and do more benchmarks …

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