2 Replies Latest reply on Jun 10, 2011 2:17 AM by Wolf-Dieter Fink

    Is there any contract between Heap size and PermGen Space

    Satyendra Sharma Newbie

      I my server Ram is 16GB but when

      1. I tried to set max heap size to 2048MB in run.bat file and when started jboss server it thrown exception as "Could not reserve enough space for object heap" it accepted max 1336 mb.


      2. and also  JBoss server did not accept more than 128MB PermGen space but when I reduce the heap size from 1336 to 1024 it accepted PermGen space to max 256MB.



      Please let me know the reason when I have enough memory why it is not accepting heap size as 2048 and what is contract between heap size and PermGen space as reducing heap size helped PermGen space to increase.