> 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 options JVM_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.
