Is there a reason why the jvm options are so different in the debian version from the standard cassandra.in.sh?  The following lines are completely missing from the init script:
        -XX:TargetSurvivorRatio=90 \
        -XX:+AggressiveOpts \
        -XX:+UseParNewGC \
        -XX:+UseConcMarkSweepGC \
        -XX:+CMSParallelRemarkEnabled \
        -XX:+HeapDumpOnOutOfMemoryError \
        -XX:SurvivorRatio=128 \
        -XX:MaxTenuringThreshold=0 \

I see these in the JVM_EXTRA_OPS line of /etc/defaults/cassandra, but I don't see where this data is actually passed into the jvm in the init script.  Am I missing something?

Lee Parker