The Eclipse Memory Analyzer is a fast and feature-rich Java heap analyzer that helps you find memory leaks and reduce memory consumption.
Use the Memory Analyzer to analyze productive heap dumps with hundreds of millions of objects, quickly calculate the retained sizes of objects, see who is preventing the Garbage Collector from collecting objects, run a report to automatically extract leak suspects.
The stand-alone Memory Analyzer is based on Eclipse RCP. It is useful if you do not want to install a full-fledged IDE on the system you are running the heap analysis.
You can use Update Site: http://download.eclipse.org/technology/mat/0.8/update-site/ for Eclipse Galileo.
This is a good tool to analyze Heap dump and Memory Leaks in Jvm.