monitor Java process memory in realtime

Question

I have a java application that its memory starting to jump and fall after few days.
Is there a tool that can show me the variables/members sizes during run/debug in real time?

Debugging it with eclipce is impossible.

Answer 1

Check out jhat and jmap.

In the longer run, consider adding a monitor to your app (with JMX, or write your own). It may help you in many situations in future.