Request for review (xs) - 8000325
Jon Masamitsu
jon.masamitsu at oracle.com
Fri Nov 30 00:19:29 UTC 2012
Ramki,
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.
Jon
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 oracle.com <mailto:jon.masamitsu at oracle.com>> wrote:
>
> This is a change in the default class unloading policy for CMS.
>
> 8000325: Change default for CMSClassUnloadingEnabled to true
>
> http://cr.openjdk.java.net/~jmasa/8000325/webrev.00/
> <http://cr.openjdk.java.net/%7Ejmasa/8000325/webrev.00/>
>
> 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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