JVM Debug Tool

Hello every one ...
I am new to Java......I need help ...
Is there any way that we can see whihc all Clasess / Objects are occupying JVM ? Is there any command line tool .....
If yes please let me know because i am in big trouble ...
I am running 4 JVM instances ... on server i am having .... huge JSP/Sevlets ..... after start the JVM around one hour or so if i see JVM memory Size and Physical memory it is just goes decreasing and it result to crash JVM .....
Same thing creates problem to my Sun - System it is goes occupying SWAP area more more .... and result is Core Dump file ..... so i want to know ... why JVM is using so much memory .. please let me know .....
I tryed with Hprof utility too ..but it is really difficult to understand ... so please help me
thanks and regards

I dont think that any console tools can help you in this matter. There are certain utility tools for windows platforms that can help you to find out
1. Which classes occupy the memory
2. Where does the processor spend most of its time
For example nro. 1 tools are like OptimizeIT and JProbe. With JProbe you can also take care of the nro. 2 type of debugging. Perhaps with optimizeit too.
Dont know though if they provide them for solaris too. could think so because they are all-java programs. Check them out.
Janne

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