It also use off-heap memory out of JVM. SerializingCacheProvider should be one of the case.
Best Regards! Jian Jin 2013/4/6 <adeel.ak...@panasiangroup.com> > Thank you Aaron and Bryan for your advice. > > I have changed following parameters and now Cassandra running absolutely > fine. Please review below setting and advice am I right or right direction. > > cassandra-env.sh > #JVM_OPTS="$JVM_OPTS -ea" > MAX_HEAP_SIZE="6G" > HEAP_NEWSIZE="500M" > > cassandra.yaml > # do not persist caches to disk > key_cache_save_period: 0 > row_cache_save_period: 0 > > key_cache_size_in_mb: 512 > row_cache_size_in_mb: 14336 > row_cache_provider: SerializingCacheProvider > > I have a querry, if Cassandra is using JVM for all operations then why we > need change above parameters separately in cassandra.yaml. > > > Thanks & Regards > > Adeel Akbar > > > Quoting aaron morton <aa...@thelastpickle.com>: > > We can see from below that you've tweaked and disabled many of the >>> memory "safety valve" and other memory related settings. >>> >> Agree. >> Also you are running with JVM heap size of 3.81GB which is non default. >> For a 16GB node I would expect 8GB. >> >> Try restoring the yaml values to the defaults and allowing the >> cassandra-env.sh file to determine the memory size. >> >> Cheers >> >> ----------------- >> Aaron Morton >> Freelance Cassandra Consultant >> New Zealand >> >> @aaronmorton >> http://www.thelastpickle.com >> >> On 5/04/2013, at 12:36 PM, Bryan Talbot <btal...@aeriagames.com> wrote: >> >> On Thu, Apr 4, 2013 at 1:27 AM, <adeel.ak...@panasiangroup.com**> wrote: >>> >>> After some time (1 hour / 2 hour) cassandra shut services on one or two >>> nodes with follwoing errors; >>> >>> >>> Wonder what the workload and schema is like ... >>> >>> We can see from below that you've tweaked and disabled many of the >>> memory "safety valve" and other memory related settings. Those could be >>> causing issues too. >>> >>> >>> hinted_handoff_throttle_delay_**in_ms: 0 >>> flush_largest_memtables_at: 1.0 >>> reduce_cache_sizes_at: 1.0 >>> reduce_cache_capacity_to: 0.6 >>> rpc_keepalive: true >>> rpc_server_type: sync >>> rpc_min_threads: 16 >>> rpc_max_threads: 2147483647 >>> in_memory_compaction_limit_in_**mb: 256 >>> compaction_throughput_mb_per_**sec: 16 >>> rpc_timeout_in_ms: 15000 >>> dynamic_snitch_badness_**threshold: 0.0 >>> >> >> >> >
