Erratic(?) CMS behaviour every 5d

[Bernd Eckenfels]

Hello,



On Fri, Sep 28, 2012 at 7:48 PM, Bernd Eckenfels
<bernd.eckenfels at googlemail.com> wrote:
> The jstat utility has a -gccause option, do you think that will help
> me as soon as the system gets into the trashing mode?

I am currently seeing only "CMS Initial Mark" and "CMS Final Remark"
as causes for OGC and "GCLocker" as cause for ParNew, so I think that
jstat will not help me later on, when the machine starts to go wild
again. The PrintCMSStatistics=2 was not helping me to get to the root.
I will play around with PrintCMSInitiationStatistics but I really
think the GC causes (which statistic was over what limit) should be
more prominently available.

Regarding my "problem": I do see a minor growth in the PGU, so I guess
this is the reason. My fist step was to resize the PG and later on
some heapdumping to find the class loader leak is in order.

Bernd