How to analyze PermGen space?

Question

Possible duplicate:
How to parse PermGen content?

I want to know what PermGen space occupies - intern () string or classes? Is there any tool to help with this analysis?

Answer 1

Memory analysis

• Use jvisualvm.exe in the JDK bin directory

• Using jvisualvm, take a Thread / Heap dump depending on the process id application you need a profile for.

• Memory Analyzer (MAT) - eclipse plugin. where you can import a bunch of heaps from jvisualvm and analyze possible leaks.

Answer 2

You can use the monitoring tools that are in the bin folder of your jdk, like "jvisualvm" or "jconsole"

Answer 3

I use Yourkit to analyze what is in the heap space. This is not free, but it is a great help when analyzing memory problems and / or performance problems. (They have an evaluation version)