Request for review (xs) - 8000325

Jon Masamitsu jon.masamitsu at
Fri Nov 30 00:19:29 UTC 2012


My favorite javac test didn't show any difference but
my PrintGCStats script needs some work so I'm
not sure I'm looking at all of the stats correctly.
I have some refworkload runs going currently
and will see what pops out tomorrow.


On 11/29/12 15:17, Srinivas Ramakrishna wrote:
> Looks good. Would be great to prominently release-note this change 
> when it appears in a public/GA update/release.
> Out of curiosity, any perf data on CMS pause time diffs from this 
> change with current NPG?
> -- ramki
> On Thu, Nov 29, 2012 at 9:46 AM, Jon Masamitsu 
> <jon.masamitsu at <mailto:jon.masamitsu at>> wrote:
>     This is a change in the default class unloading policy for CMS.
>     8000325:        Change default for CMSClassUnloadingEnabled to true
>     <>
>     With perm gen removal it becomes important for CMS to unload
>     classes to avoid excessive consumption of native memory for
>     metadata.
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