Major Description
(reference original posting on Nabble: http://www.nabble.com/forum/ViewPost.jtp?post=12798657)
We have a one topic publisher that is attempting to publish 2 million messages with 4 durable subscribers. Things go fine until we hit 1.7 million messages - then we get an OutOfMemoryError.
ActiveMQ is setup to use 5 x 20M log files, and Derby JDBC persistence. We use the JVM memory settings -Xmx1024M and <usageManager id="memory-manager" limit="512 MB"/>
At the time of the out of memory, one of the log file is gone crazy and it's size is 415M. The Derby size is big as well.
We are using session client acknowledgment. and prefetch size of 1 (we need to serialize message consumption).
each message is being acknowledged using javax.jms.Message.acknowledge();
Did not find anything on how to change checkpoint interval for persistence.