GC performance regression between 7u11->7u45?

[Jon Masamitsu]

Ramki,

I don't think we've seen such a regression.  Fix the heap size and
turn off UseAdaptivesizePolicy.

What platform?

Jon

On 11/14/13 1:46 PM, Srinivas Ramakrishna wrote:
>
> Is anyone, especially the perf and gc teams inside Oracle, aware of 
> any parallel young (PS) gc performance regressions
> from 7u11 to 7u45?
>
> I am seeing some 20-30% regression in minor gc times (and a lesser 
> increase in promotion volume per scavenge),
> on some random testing of a largish application. Haven't dug into the 
> details yet, but wondered if this was noted
> on any of the Oracle perf/gc or community perf/gc radars and if 
> there's any guidance available.
>
> As I delve deeper the nature of this apparent GC regression, which I 
> just became aware of, I'll post more.
>
> thanks for any help!
> -- ramki
>
>
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