Long ParNew Collection Time

[Shay Banon]

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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