Grails(25)Grails Memory/Thread Issue Checking

Grails(25)Grails Memory/Thread Issue Checking

1. JDK Config
It is said that the grails will auto create classes and out of memory the PermSize.

It is said that we need to to config there to make jdk 1.6 working.
-XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled

2. Multi Thread
executorService = new ThreadPoolExecutor(
PUSH_THREAD_POOL_SIZE, // core thread pool size
PUSH_THREAD_POOL_SIZE, // maximum thread pool size
    10, // time to wait before resizing pool
    TimeUnit.SECONDS,
    new LinkedBlockingQueue<Runnable>(),
    new ThreadPoolExecutor.DiscardPolicy());
LinkedBlockingQueue is with no size, so we can hold as much task as we can.

3. Connection Remote JMX Tomcat
http://www.mkyong.com/tomcat/jconsole-jmx-remote-access-on-tomcat/

Configurations
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.port={port to access}
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Djava.rmi.server.hostname={optional, allow what ip to access this Tomcat}

Not working throw proxy.

References:
JDK Config
http://docs.oracle.com/cd/E13209_01/wlcp/wlss30/configwlss/jvmgc.html
http://stackoverflow.com/questions/3334911/what-does-jvm-flag-cmsclassunloadingenabled-actually-do
http://stackoverflow.com/questions/3717937/cmspermgensweepingenabled-vs-cmsclassunloadingenabled/3720052#3720052