OK - where do I start if I need to tune GlassFish?

Scenario: The hot new application you have deployed on GlassFish is expected to garner multitude of users who are going to hammer away at your application. Where do you start to optimize your performance?

Yes, there is a performance guide available but you don't have time to digest this material. You could use the new Performance Advisor's "Tuner" feature of Enterprise Manager that helps you tune your application with a series of questions, but you have to present to your boss and you need to be prepared to answer all of his technical questions. Where do you start?

Solution: Along with the release of the GlassFish Portfolio, a whitepaper that I wrote has been published today. This performance white paper, titled "Optimize GlassFish Performance", lists the top 11 parameters that you can investigate when tuning your application deployed on GlassFish based on the data that the Java Performance Team has collected during our numerous benchmarking exercises. There is a brief explanation of each parameter with a recommended 'default' value followed with some data that illustrates the importance of tuning GlassFish for performance. Benchmarking in general does require experimentation and is very much application-specific, but this whitepaper should provide a good primer for those wanting to get their feet wet.
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