On 16/09/2014 13:34, Mark Derricutt wrote:

On 16 Sep 2014, at 23:54, Balchandra Vaidya wrote:

    Permanent Generation feature has been removed.
    
http://mail.openjdk.java.net/pipermail/hotspot-dev/2012-September/006679.html
    http://openjdk.java.net/jeps/122
    http://bugs.java.com/bugdatabase/view_bug.do?bug_id=6964458
    https://blogs.oracle.com/poonam/entry/about_g1_garbage_collector_permanent

I realise perigean is gone, but from that first link you posted:

|  - The permanent generation has been removed. The
    PermSize and  MaxPermSize are ignored and a warning is
    issued if they are present on the command line.
|

It should be /ignored/ - not crash the VM.


First, I think the VM always exited/not started when unsupported flag is passed.

Second, a warning message was displayed when PermSize and MaxPermSize
flags were passed in jdk 8 for allowing applications to migrate away. In JDK 9,
exiting the VM is consistent with any unsupported flag used.


Thanks
Balchandra


Mark


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