A quick change on this... It's not committed yet, as it will take me one or two days before I can commit my changes, but I'm changing this. Now AIO will only start the NativePollerThread when the first write or read is done, and not when the file is opened. This way we won't have any pollers running if there are no pending writes. This will save only 1 thread. But starting the poller when the first write is done is a better behaviour IMO. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4173788#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...