Edit the setting that are already present in run.conf: JAVA_OPTS="-Xms128m -Xmx512m ..." View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4165207#4165207 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4165207