In standalone mode, you can add "-Xloggc:gc.log.`date +%Y%m%d%H%M%S`" (or Windows equivalent batch scripting) to have timestamped GC logs which is useful to prevent them from being overwritten when a server is restarted. This does not work in domain mode, since JBoss obviously does not process the back-ticks like a shell interpreter.

It would be useful to be able to get time-stamped gc logs in domain mode.