Category Archives: Performance tuning

OutOfMemoryError: PermGen space

Posted on November 25, 2008 by admin

Today, during load testing I saw one of those dreaded “java.lang.OutOfMemoryError: PermGen space” errors on our fairly large web application deployed in Tomcat running on Sun JDK 1.5. We used to use the default (64m) for the perm space. I bumped it … Continue reading →

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Performance tuning vs. Lean/Agile

Posted on November 6, 2008 by admin

I am currently working on performance tuning & refactoring a product. And, interestingly I found some Agile/Lean principles that apply for performance tuning and refactoring: Most Lean principles appear counter-intuitive at first Aim for system optimization instead of point optimization Build … Continue reading →

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