"PeterJ" wrote : Rather that telling you the Sun equivalents that you already know about, why don't you list the ones you already found, then we can tell you if they are correct. | | I assume you have seen http://java.sun.com/javase/technologies/hotspot/vmoptions.jsp Peter, I could not find SUN equivalents for XXlazyunlocking -XXtlasize:min=4k,preferred=512k -XXcallprofiling Please help me out here. This is what i have come up with for SUN (are they correct?): JAVA_OPTS=" -Xms2048M -Xmx2048M -server -XX:+UseParallelGC -verbose:memory -XX:+PrintGCDetails -XX:+AggressiveOpts -Djava.security.policy=$JAVA_HOME/lib/security/java.policy " JRockit: JAVA_OPTS=" -Xms2048M -Xmx2048M -jrockit -Xgc:parallel -Xverbose:memory -Xgcreport -XXaggressive -XXlazyunlocking -XXtlasize:min=4k,preferred=512k -XXcallprofiling -Djava.security.policy=$JAVA_HOME/lib/security/java.policy " thank you View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4186103#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...