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Scalr and MNPP

Good news for all Percona Software users out there. There are more ways how you can get access to Percona Software. If you’re using Scalr (See also Scalr Project on Google Code) you might be …

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mk-query-digest, query comments and the query cache

I very much like the fact that MySQL allows you to embed comments into SQL statements. These comments are extremely convenient, because they are written into MySQL log files as part of the query. This …

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How Percona does a MySQL Performance Audit

Our customers or prospective customers often ask us how we do a performance audit (it’s our most popular service). I thought I should write a blog post that will both answer their question, so I …

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Worse than DDOS

Today I worked on rather interesting customer problem. Site was subject what was considered DDOS and solution was implemented to protect from it. However in addition to banning the intruders IPs it banned IPs of …

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Web Site Optimization: FrontEnd and BackEnd

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 …

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Pitfall of proxying HTTP requests through Lighttpd

Recently I had a case with a web server farm where a random node went down every few minutes. I don’t mean any of them rebooted except once or twice, but rather they were slowing …

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Top 5 Wishes for MySQL

About a week ago Marten send me email pointing to his article published on Jays Blog (Come on Marten, it is time for you to get your own blog). I should have replied much earlier …

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Commodity Hardware, Commodity Software and Commodity People

In the previous post I mentioned not all architectures and solutions work for Commodity People, and people seems to agree with me. Number of vendors would claim they are in Commodity Software or Hardware business …

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Content delivery system design mistakes

This week I helped dealing with performance problems (part MySQL related and part related to LAMP in general) of system which does quite a bit of content delivery, serving file downloads and images – something …

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Debugging sleeping connections with MySQL

Have you ever seen connection in the SHOW PROCESSLIST output which is in “Sleep” state for a long time and you have no idea why this would happen ? I see if frequently with web …

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