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From "Will @ SOHO" <w...@voodoolunchbox.com>
Subject Re: constant CMS GC using CPU time
Date Tue, 23 Oct 2012 01:15:44 GMT
On 10/22/2012 09:05 PM, aaron morton wrote:
> # GC tuning options
> JVM_OPTS="$JVM_OPTS -XX:+UseParNewGC"
> JVM_OPTS="$JVM_OPTS -XX:+UseConcMarkSweepGC"
> JVM_OPTS="$JVM_OPTS -XX:+CMSParallelRemarkEnabled"
> JVM_OPTS="$JVM_OPTS -XX:SurvivorRatio=8"
> JVM_OPTS="$JVM_OPTS -XX:MaxTenuringThreshold=1"
> JVM_OPTS="$JVM_OPTS -XX:CMSInitiatingOccupancyFraction=75"
> JVM_OPTS="$JVM_OPTS -XX:+UseCMSInitiatingOccupancyOnly"
> JVM_OPTS="$JVM_OPTS -XX:+UseCompressedOops"
>
You are too far behind the reference JVM's. Parallel GC is the preferred 
and highest performing form in the current Security Baseline version of 
the JVM's.

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