I'll repeat an earlier observation: PeterJ wrote : It looks like you have modified the run.bat because the typical heap settings did not show up in this line: | | JAVA_OPTS: -Dprogram.name=run.bat -Xrs I suspect you read a post somewhere that you need to set -Xrs to prevent JBoss AS from responding to signals and shutting down. However, you set JAVA_OPTS improperly, overwriting the heap sizes and other settings that were made in run.conf.bat. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4255962#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...