Jdb: problem determining free memory

[Sierra Bravo]

Hi
I've attached jdb to a running JVM, and am able to see its threads &
classes. I would like to look at runaway memory allocation in certain
parts of the program. However, when I type 'memory' in the JVM prompt
to locate free memory, it says 'command no longer supported'. I'm
unable to locate any alternative command to do this. I'm using
j2sdk1.4.2.

TIA


sb