The JVM heap settings are in the run.bat script, change the value for -Xmx and -Xms in this line: rem JVM memory allocation pool parameters. Modify as appropriate. | set JAVA_OPTS=%JAVA_OPTS% -Xms128m -Xmx512m I recommend setting both to the same value for now (try 512M, and if that does not work, 1024M). If neither value works, there must be a memory leak somewhere. Try using the JDBC driver from MySQL instead of the one from JConnect. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4096615#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...