I think that SerializingCacheProvider have more JAVA HEAP footprint, then i think
2012/6/4 ruslan usifov <ruslan.usi...@gmail.com>: > 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 >> >>
