add UseCMSInitiatingOccupancyOnly. patch by jbellis

git-svn-id: https://svn.apache.org/repos/asf/cassandra/branches/cassandra-0.6@992331 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -3,7 +3,8 @@
  * remove the remaining vestiges of the unfinished DatacenterShardStrategy 
    (replaced by NetworkTopologyStrategy in 0.7)
  * handle zero-length (or missing) rows during HH paging (CASSANDRA-1432)
- * add CMSInitiatingOccupancyFraction=80 to default JVM options
+ * add CMSInitiatingOccupancyFraction=75 and UseCMSInitiatingOccupancyOnly
+   to default JVM options
  * decrease jvm heap for cassandra-cli (CASSANDRA-1446)
  * document DoConsistencyChecksBoolean option to disable Read Repair
 

bin/cassandra.in.sh

@@ -46,7 +46,8 @@ JVM_OPTS=" \
         -XX:+CMSParallelRemarkEnabled \
         -XX:SurvivorRatio=8 \
         -XX:MaxTenuringThreshold=1 \
-        -XX:CMSInitiatingOccupancyFraction=80 \
+        -XX:CMSInitiatingOccupancyFraction=75 \
+        -XX:+UseCMSInitiatingOccupancyOnly \
         -XX:+HeapDumpOnOutOfMemoryError \
         -Dcom.sun.management.jmxremote.port=8080 \
         -Dcom.sun.management.jmxremote.ssl=false \