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Weblogic JMS - Persistance Store & JVM memory

 
Jagadeesh Balasubramanian
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Hi everyone,
I have a doubt if having lots of pending messages in the queue could affect the memory of the application. The jmsservers are attached to persistent stores now. We have error queues configured that could have lots of messages unattended. The jmsstore size on the disk is approximately 2 GB. I have felt the restarts are much slower as the jms store size has increased. So can anyone help me understand
1. For JMSServers with persistent store, how much of JVM comes into play for production and consumption
2. During restarts, does weblogic load some portion of jmsstore into memory?
Regards,
Jagadeesh
 
Deepak Bala
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These are internal implementation details and it will be hard, if not impossible to know this without actually testing it.

I am not sure how much memory will be consumed for each persistent message. I do not see a reason why WL should load the persistent store to memory. Are you trying to solve any particular problem ?
 
Jagadeesh Balasubramanian
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Yes Deepak. We had few outofmemory issues with our server. The jmsstore size is 2 gb mostly caused by error queues.
The server restart also have been very slow. Once we had to kill the server and after that it refused to startup. The thread dump shows a fatal exception when reading from store. The jmx of the server is 2 gb. So it could be either because the force kill have caused a corruption of file store or the jms store size is too big.
We are planing for a test where we could load a jmsstore and see how the jstat results differ.
 
Deepak Bala
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Is your 2 GB space occupied fully ? I have not heard of huge space setting causing weblogic startup failure. It would be interesting to see your results. Do post them here when you have them
 
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