Request for review (xs) - 8000325
ysr1729 at gmail.com
Sat Jan 5 00:10:00 UTC 2013
Thanks for the perf data, Jon! I'd say that's not too bad.
Out of curiosity, was the diff statistically significant per appropriate
T-test? (i've seen remark pauses show some variance depending on
application and tuning.)
On Fri, Jan 4, 2013 at 3:23 PM, Jon Masamitsu <jon.masamitsu at oracle.com>wrote:
> On 11/29/2012 3:17 PM, 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?
> I ran refworkload server_reference and saw a regression only on
> specjbb2000. The regression was on the
> remark pauses (as would be expected) and the largest I saw was about 12%.
> Larger than I would have
> hoped. The unloading is done serially so maybe things around it got
> -- ramki
>> On Thu, Nov 29, 2012 at 9:46 AM, Jon Masamitsu<jon.masamitsu@**oracle.com<jon.masamitsu at oracle.com>
>> 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
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