If you want to know how much memory is used within the JVM rather than how much is allocated to the JVM, that would be a different story. I am not sure how to do that. Maybe that is the sort of thing the jvm_monitor probe is designed to do.
=> Exactly, I need to know much memory is allocated and used by JVM. It seems there is a memory leak but i need to confirm this with historical data. I am pretty sure, there is a way to enable JMX on UMP but I don't know how