5 Replies Latest reply on Jul 16, 2012 7:16 PM by vj_mukunth

    Old Gen space is underutilized only ~67%

      Our application is on Weblogic 9.2.2 and runs on Solaris 10 (32 bit). Below is the weblogic startup configurations for Memory Arguments,

      MEM_ARGS="-XX:NewSize=512m -XX:MaxNewSize=512m -XX:SurvivorRatio=8 -XX:PermSize=512m -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -Xms2048M -Xmx2048M -XX:MaxPermSize=512m -XX:CMSWaitDuration=3000"

      Max New Gen Size: 512M
      Total Heap : 2G
      Max Old Gen : 1.5G
      Max Perm Gen: 512M

      Even though the max old gen size is 1.5G, we never see it being used more than 1G and GC kicks off whenever Old Gen reaches 1G. Is there any specific reasons for it?
      Also is there a way to make complete use of the old gen space about 80-85%?

      Please let me know if more information is required.