0 Replies Latest reply on May 14, 2013 9:23 AM by 1008783

    Optimization Issues - Jrockit with JBoss


      I am quiet new here. forgive if my questions are dump.

      We are having a problem on JBoss(Version: 5.0.0.CR2) server running with Jrockit(Version :build R27.6.5-32_o-121899-1.6.0_14-20091001-2107-windows-ia32)

      The server hang frequently.

      was trying to optimize the JVM settings.

      Initial JVM setting was : set JAVA_OPTS=%JAVA_OPTS% -Xms768m -Xmx1024m -XX:MaxPermSize=256m

      Later have chaged to

      set JAVA_OPTS=%JAVA_OPTS% -Xms1024m -Xmx1024m -Xns512m -XXkeepAreaRatio=3 -XXsetGC:genparcon -XXcompactSetLimit:10200 -Xverbose:gc -Xverboselog:jbossVerboseLog.txt

      But getting some page fault errors as shown below,

      +[INFO ][memory ] Warning: Your computer has generated 31142 page faults during the last garbage collection.+

      +[INFO ][memory ] If you find this swapping problematic, please consider running JRockit with a smaller heap.+

      After few hours it started Throwing OutOfMemory: allocLargeObjectOrArray

      So I included the XXtlaSize in jvm settings,

      set JAVA_OPTS=%JAVA_OPTS% -Xms1024m -Xmx1024m -Xns512m -XXlargeObjectLimit=70k -XXtlaSize=70k -XXminBlockSize=96k -XXkeepAreaRatio=3 -XXsetGC:genparcon -XXcompactSetLimit:10200  -Xverbose:gc -Xverboselog:jbossVerboseLog.txt

      But server become very unstable, server restarted automatically.

      Now we revert all the changes to initial settings.

      Please suggest me in case if i need to look into something else.

      Thanks in advance.