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HBase GC Configuration
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| egrep 'CMS-(re|ini)' `ls -1tr /var/log/hbase/gc.regionserver.201* | tail -1` | cut -d'=' -f4 | sort -n | |
| grep -r ParNew `ls -1tr /var/log/hbase/gc.regionserver.201* | tail -1` | cut -d'=' -f4 | sort -n | tail -10 | |
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| jmap -F -heap `jps | grep HReg | cut -f1 -d' '` |
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| export HBASE_REGIONSERVER_OPTS="-Xms$(($HBASE_HEAPSIZE/2))m -XX:NewSize=256m -XX:MaxNewSize=256m -XX:CMSInitiatingOccupancyFraction=70 -XX:+UseCMSInitiatingOccupancyOnly -XX:+UseParNewGC -XX:+CMSParallelRemarkEnabled -XX:-CMSConcurrentMTEnabled -Xloggc:$HBASE_LOG_DIR/gc.regionserver.`date +%Y%m%d_%H%M%S`.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps" |
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