4 Replies Latest reply on Aug 26, 2014 2:36 PM by Wolf-Dieter Fink

    Major problems with frequent Full GCs

    gcrookie Newbie

      Hey community,

       

      i have major Full GC problems on one of my jboss machines. Two month ago we thought it is a memory leak or other application issue and changed many parts (corresp. hibernate session and caching).

       

      This time the machine runs 12 days without "bigger" performance and response issues. But today the response time became periodically higher and we had to restart the server.

       

      In GC Log we see - just before restarting the machine - full gc running up to 7 times a minute with up to 6 seconds duration.

       

      We made sure that out application does not call System.gc().

       

      Here the Start Params:

       

      -Xms=3520m -Xmx=3520m -XX:PermSize=128m -XX:+CMSClassUnloadingEnabled -XX:+CMSPermGenSweepingEnabled

       

      I did not find out why the full gc is called (so frequently). Hopefully you can help me with my gc log...

       

      Screen Shot 2014-08-12 at 15.42.59.png

       

       

      Joe GC rookie

       

      Message was edited by: Jörg Kethur - added gc viewer grafic

       

      Message was edited by: Jörg Kethur added jboss startup params