From: Oleksiy Stashok <Oleksiy.Stashok_at_Sun.COM>
Date: Mon, 24 May 2010 11:30:09 +0200

Here is a good blog from Jeanfrancois on how to use jmap, jhat to
investigate the heap.

http://jfarcand.wordpress.com/2006/02/15/using-mustangs-jmapjhat-to-profile-glassfish-2/