The problem here is that ‘jinfo -flags’ only looks at the command line, but if a user has changed a flag after the VM started (for example by using ‘jinfo -flag’) that new value does not show up.
I am changing the output so that ‘jinfo -flags’ now prints something like this: Non-default VM flags: -XX:InitialHeapSize=268435456 -XX:MaxHeapSize=4294967296 -XX:+PrintGCDetails -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseParallelGC Command line: -XX:+PrintGCDetails webrev: http://cr.openjdk.java.net/~sla/6606002/webrev.00/ bug: https://bugs.openjdk.java.net/browse/JDK-6606002 Thanks, /Staffan