Long ParNew Collection Time

Tue Jan 11 07:40:38 UTC 2011

Is the system TOD being changed? May be an overzealous NTP daemon?
Can you make sure NTP is disabled and see if the problem goes away?

-- ramki

On 1/10/2011 10:30 PM, Shay Banon wrote:
> Hi,
>
>
> Running a JVM (1.6u23) on ubuntu 10.0 (machine has 32gb) getting this GC log output:
>
>
> 3856.471: [GC 3856.471: [ParNew: 118016K->13056K(118016K), 37.8958700 secs] 689035K->593566K(8375552K), 37.8959970 secs] [Times: user=0.00 sys=0.00, real=37.90 secs]
>
>
> As you can see, the it seems like time wise, its all real.
>
>
> Flags used are:
>
>
> -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -Xms8g -Xmx8g
>
>
> Tried also with:
>
>
> * -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75
> * -XX:-CMSConcurrentMTEnabled
>
>
> Checked vmstat during the run, and don't see any swapping going on (si/so are 0, no swap).
>
>
> Any idea on how to try and solve this?
>
>
> cheers,
> -shay.banon
>
>
>
>
>
>
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