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From Xiang Hua <bea...@gmail.com>
Subject Re: HBASE garbage collection problem
Date Thu, 13 Sep 2012 04:48:44 GMT
hi,
   where can i fidn the GC log?
   I am a newcomer.
   Thanks!

beatls

On Wed, Sep 12, 2012 at 11:09 PM, Amlan Roy <amlan.roy@cleartrip.com> wrote:

> Hi,
>
>
>
> I was doing some load testing on my cluster. I am writing to HBase (version
> 0.92.0) from 20 threads simultaneously. After running the program for some
> time, one of my machines got unresponsive. I checked the GC log and found
> occurrences of both "concurrent mode failure" and "promotion failed" on
> that
> machine. I have the following configuration in hbase-env.sh:
>
>
>
> export HBASE_REGIONSERVER_OPTS="$HBASE_REGIONSERVER_OPTS -Xmx4g -Xms4g
> -Xmn128m -XX:+UseParNewGC -XX:+UseConcMarkSweepGC
> -XX:CMSInitiatingOccupancyFraction=70 -verbose:gc -XX:+PrintGCDetails
> -XX:+PrintGCTimeStamps -Xloggc:/data/gc-hbase.log"
>
>
>
> Please let me know if this configuration is incorrect.
>
>
>
> Regards,
>
> Amlan
>
>

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