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MySQL SpecJAppServer2004 results

 | May 27, 2006 |  Posted In: Benchmarks

Sun has now published SpecJAppServer2004 benchmark results with MySQL. The results are pretty good as we can see and it is also good to know some room for tuning remains so we can hope getting even better results this time. Jenny Chen published good MySQL Tuning writeup so I would not repeat it. It was […]

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Jeremy Cole on MySQL Replication

 | May 27, 2006 |  Posted In: Insight for DBAs

Jeremy Cole recently posted very nice post about MySQL Replication Performance. There are however few points I should comment on. Jeremy Speaks about MyISAM and Innodb in the same terms, in fact they are quite different for Replication. As you probably know MyISAM uses buffered IO so if master crashes you’re out of sync anyway […]

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How Web Services world affect LAMP Stack

 | May 22, 2006 |  Posted In: Insight for Developers

In connection to my previous post I was thinking how Web 2.0 with its massive use of Web Services affect LAMP Stack ? Well actually there are serious difference both for client and server application development which you might want to take into account. If you’re developing Web Service Server application you will most likely […]

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Speedup your LAMP stack with LigHTTPD

 | May 21, 2006 |  Posted In: Insight for Developers

Apache Web server could frequently be bottleneck for your LAMP stack, or you might be wasting resources on your web servers. The problem with Apache server comes from “client per process” architecture which you have to stick to at least for dynamic content served by PHP or ModPerl. With “client per process” you end up […]

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MySQL Server Memory Usage

 | May 17, 2006 |  Posted In: Insight for DBAs

Every so often people ask me the question how should they estimate memory consumption by MySQL Server in given configuration. What is the formula they could use. The reasons to worry about memory usage are quite understandable. If you configure MySQL Server so it uses too small amount of memory it will likey perform suboptimally. […]

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To pack or not to pack – MyISAM Key compression

 | May 13, 2006 |  Posted In: Insight for DBAs

MyISAM storage engine has key compression which makes its indexes much smaller, allowing better fit in caches and so improving performance dramatically. Actually packed indexes not a bit longer rows is frequent reason of MyISAM performing better than Innodb. In this article I’ll get in a bit more details about packed keys and performance implications […]

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Innodb Fuzzy checkpointing woes

 | May 10, 2006 |  Posted In: Insight for DBAs

As you might know Innodb storage engines uses Fuzzy Checkpointing technique as part of it recovery strategy.  It is very nice approach which means database never needs to “stall” to perform total modified pages flush but instead flushing of dirty pages happens gradually in small chunks so database load is very even. This works great […]

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Descending indexing and loose index scan

 | May 9, 2006 |  Posted In: Insight for Developers

Comments to my previous posts, especially this one by Gokhan inspired me to write a bit about descending indexes and about loose index scan, or what Gokhan calls “better range” support. None of these are actially related to Innodb tables in general – these are features MySQL should get for all storage engines at some […]

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