By alexismp on Mar 03, 2011
This is a feature that is part of Oracle GlassFish Server Control which comes bundled with Oracle GlassFish Server and available for free trial.
This 6-minute demo walks you through a tuning scenario answering questions about the underlying hardware, high-level JVM options, etc. and present you with a list of suggested optimizations. You can also apply changes directly to the configuration of the server.
This screencast is hosted on the GlassFish YouTube Channel.