anchor.diff:  # JVM_OPTS="$JVM_OPTS -XX:+PrintPromotionFailure"
   # JVM_OPTS="$JVM_OPTS -XX:PrintFLSStatistics=1"
   # JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc-`date +%s`.log"
  +# If you are using JDK 6u34 7u2 or later you can enable GC log rotation
  +# don't stick the date in the log name if rotation is on.
  +# JVM_OPTS="$JVM_OPTS -Xloggc:/var/log/cassandra/gc.log"
  +# JVM_OPTS="$JVM_OPTS -XX:+UseGCLogFileRotation"
  +# JVM_OPTS="$JVM_OPTS -XX:NumberOfGCLogFiles=10"
  +# JVM_OPTS="$JVM_OPTS -XX:GCLogFileSize=10M"
   
   # uncomment to have Cassandra JVM listen for remote debuggers/profilers on port 1414
   # JVM_OPTS="$JVM_OPTS -Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=1414"
  
positive.code: JVM_OPTS="$JVM_OPTS -XX:MaxTenuringThreshold=1"
  JVM_OPTS="$JVM_OPTS -XX:CMSInitiatingOccupancyFraction=75"
  JVM_OPTS="$JVM_OPTS -XX:+UseCMSInitiatingOccupancyOnly"
  
  # GC logging options -- uncomment to enable
  # JVM_OPTS="$JVM_OPTS -XX:+PrintGCDetails"
  
negative.code:         SunOS)
              system_memory_in_mb=`prtconf | awk '/Memory size:/ {print $3}'`
              system_cpu_cores=`psrinfo | wc -l`
          ;;
          Darwin)
              system_memory_in_bytes=`sysctl hw.memsize | awk '{print $2}'`
              system_memory_in_mb=`expr $system_memory_in_bytes / 1024 / 1024`
              system_cpu_cores=`sysctl hw.ncpu | awk '{print $2}'`
          ;;
          *)
              # assume reasonable defaults for e.g. a modern desktop or
  