I just did the following test after the compactor was implemented (on my branch for now). Added 1000 messages to a destinationB. Then started runListener and runSender on destinationA with 100K messages. And that showed the linked-list effect because of the 1000 messages, as I predicted. Compacting was being executed about 3 times during that execution. I double checked if there wasn't anything wrong, and everything was correct... it was just the linked-list effect. Compacting will be executed every time the numberOfFiles > minCompactSize (as defined on http://www.jboss.org/index.html?module=bb&op=viewtopic&t=157889). View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4241314#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...