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From "James Strachan" <>
Subject Re: Topic Messages being held in VMTopicMessageStore
Date Tue, 25 Jul 2006 14:43:04 GMT
I'd recommend you upgrade to 4.0.1. 3.2 is pretty old.

On 7/25/06, jhaddad <> wrote:
> We've recently switched from jboss-mq to activemq.  We're using version 3.2
> in a JBoss 4/Tomcat 5 container.  The application creates 1 topic and 1
> queue.  Remote clients send messages to our server via the queue and all
> messages sent from the sever to the remote clients go through the topic.
> We've config'd activemq to use VM persistence.
> The problem:  Recently we started seeing OutOfMemoryErrors.  I'm sure this
> isn't a leak, but probably a configuration issue, or something like that.
> Using YourKit to profile memory usage, I see that the VMTopicMessageStore
> seems to be holding on to all (or at least a lot of the) messages sent.
> After a 15 hour run, it's internal message table is up 32K messages.  And
> that is with a relatively low message throughput (about 70 message
> s/minute).  The one thing I tried was to set the delivery mode to
> NON_PERSISTENT on the producer, but that didn't seem to make a difference.
> We do not have any durable subscriptions.
> Any insight would be appreciated.
> --
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