On Aug 14, 2006, at 4:24 PM, SimonInOz wrote:
My ActiveMQ seems to get Out of Heap errors if I leave it long enough.
Can you run jmap to see what's taking up so much space? jmap comes
with the jdk and is a breeze to run. We've seen a couple brokers go
oom, but haven't gotten to them to properly debug before they were
rebooted, and it seems pretty rare.
To add to the strangeness of life, if I show the DOS box, then
minimise it
again, the Java memory usage plummets. Then starts to climb once
more. Is
this some sort of bug in Java or Windows?
This sounds like it's possibly plain old garbage collection. Hop onto
a broker with jconsole and start a garbage collection run and watch
the memory graph. Does it do the same thing? The memory drop from a
simple forced gc run can be pretty dramatic.
John
