Tim, Wow, thank you; my assumption was totally wrong.
On the flip side, to ensure my understand of optimizedAcknowlege="true" isn't wrong either, does the client "ack" groups of messages using a single network call instead of individually? (Batch size being 65% of prefetchSize) -- View this message in context: http://activemq.2283324.n4.nabble.com/How-to-test-prefetch-size-is-actually-working-tp4709766p4709780.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.