These GC settings are the default (recommended?) settings from cassandra-env. I added the UseCompressedOops.
-Bryan On Mon, Oct 22, 2012 at 6:15 PM, Will @ SOHO <w...@voodoolunchbox.com>wrote: > 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. > -- Bryan Talbot Architect / Platform team lead, Aeria Games and Entertainment Silicon Valley | Berlin | Tokyo | Sao Paulo
