Stefan Will wrote:
Raghu,
I don't actually have exact numbers from jmap, although I do remember that
jmap -histo reported something less than 256MB for this process (before I
restarted it).
I just looked at another DFS process that is currently running and has a VM
size of 1.5GB (~600 resident). Here jmap reports a total object heap usage
of 120MB. The memory block list reported by jmap <pid> doesn't actually seem
to contain the heap at all since the largest block in that list is 10MB in
size (/usr/java/jdk1.6.0_10/jre/lib/amd64/server/libjvm.so). However, pmap
reports a total usage of 1.56GB.
-- Stefan
you know, if you could get the Task Tracker to include stats on real and
virtual memory use, I'm sure that others would welcome those reports
-know that the job was slower and its VM was 2x physical would give you
a good hint as to the root cause.
