I have setup 5GB of JavaHeap wit follow tuning: MAX_HEAP_SIZE="5G" HEAP_NEWSIZE="800M"
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="$JVM_OPTS -XX:MaxTenuringThreshold=5" JVM_OPTS="$JVM_OPTS -XX:CMSInitiatingOccupancyFraction=65" JVM_OPTS="$JVM_OPTS -XX:+UseCMSInitiatingOccupancyOnly" JVM_OPTS="$JVM_OPTS -XX:CMSFullGCsBeforeCompaction=1" Also I set up 2GB to memtables (memtable_total_space_in_mb: 2048) My avg heap usage (nodetool -h localhost info): 3G Based on "nodetool -h localhost cfhistograms" i calc avg row size 70KB I setup row cache only for one CF with follow settings: update column family building with rows_cached=10000 and row_cache_provider='SerializingCacheProvider'; When i setup row cache i got promotion failure in GC (with stop the world pause about 30secs) with almost HEAP filled. I very confused with this behavior. PS: i use cassandra 1.0.10, with JNA 3.4.0 on ubuntu lucid (kernel 2.6.32-41) 2012/6/4 aaron morton <aa...@thelastpickle.com>: > Yes SerializingCacheProvider is the off heap caching provider. > > Can you do some more digging into what is using the heap ? > > Cheers > A > > ----------------- > Aaron Morton > Freelance Developer > @aaronmorton > http://www.thelastpickle.com > > On 1/06/2012, at 9:52 PM, ruslan usifov wrote: > > Hello > > I begin use SerializingCacheProvider for rows cashing, and got > extremely JAVA heap grows. But i think that this cache provider > doesn't use JAVA heap > >
