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From eccrowe <>
Subject ActiveMQ Topic Memory Usage Requirements
Date Thu, 08 Feb 2007 04:39:24 GMT


I apologize in advance if this question has already been asked before, but
my forum search has not been fruitful in regards to this question as of yet.

The question I have is about the memory usage requirements with a
non-persistent topic.  We are running ActiveMQ 4.0-RC2 in an embedded
environment where most memory available on the system has been pre-allocated
to various processes including our JVM (128 MB).    The broker memory
manager has been setup such that its limit is at 10MB.

I believe that the entirety of this 10MB is included within our JVM, but
would appreciate a confirmation on that suspicion.  Stated a different way,
is there any RAM that must be allocated outside of the JVM for a topic
consumer to be able to adequately receive messages?  Will a consumer
possibly stop receiving messages altogether if there was adequate memory
pre-allocated to the JVM but not outside of its virtual machine?

Many thanks in advance.
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