> If you are talking about 1.2.x then I also have memory problems on the idle cluster: java memory constantly slow grows up to limit, then spend long time for GC. I never seen such behaviour for 1.0.x and 1.1.x, where on idle cluster java memory stay on the same value.
No I am running Cassandra 1.1.8.> Can you paste you gc config?
I believe the relevant configs are these:# GC tuning optionsJVM_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"
I haven't changed anything in the environment config up until now.> Also can you take a heap dump at 2 diff points so that we can compare it?I can't access the machine at all during the stop-the-world freezes. Was that what you wanted me to try?> Uncomment the followings in "cassandra-env.sh".Done. Will post results as soon as I get a new stop-the-world gc.> If you are unable to find a JIRA, file one
Unless this turns out to be a problem on my end, I will.