Hi, Thanks Jonathan for your reply. I modified key_cache_size_in_mb and row_cache_size_in_mb values inside cassandra.yaml. but not able to see it's effect using command " *./nodetool -h 107.108.189.212 cfstats*". Can u let me know how to verify that the setting for key_cache_size and row_chache_size has taken place.
With Regards, Amit On Tue, Aug 21, 2012 at 8:19 PM, Jonathan Ellis <jbel...@gmail.com> wrote: > setcachecapacity is obsolete in 1.1+. Looks like we missed removing > it from nodetool. See > http://www.datastax.com/dev/blog/caching-in-cassandra-1-1 for > background. > > (Moving to users@.) > > On Tue, Aug 21, 2012 at 8:19 AM, Amit Handa <amithand...@gmail.com> wrote: > > I started exploring apache cassandra 1.1.3. I am facing problem with how > to > > improve performance of cassandra using caching configurations. > > I tried setting following configurations: > > > > ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 200005 0 > > ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 0 200005 > > ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 200005 > 200005 > > ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 444 444 > > > > > > But when i am checking that this particula configuration are really been > > configured using command: > > ./nodetool -h 107.108.189.212 cfstats > > > > it's showing following results for keySpace DemoUser and column Family > > Users: > > *Keyspace: DemoUser > > Read Count: 21914 > > Read Latency: 0.08268495026010769 ms. > > Write Count: 87656 > > Write Latency: 0.06009481381765082 ms. > > Pending Tasks: 0 > > Column Family: Users > > SSTable count: 1 > > Space used (live): 1573335 > > Space used (total): 1573335 > > Number of Keys (estimate): 22016 > > Memtable Columns Count: 0 > > Memtable Data Size: 0 > > Memtable Switch Count: 1 > > Read Count: 21914 > > Read Latency: 0.083 ms. > > Write Count: 87656 > > Write Latency: 0.060 ms. > > Pending Tasks: 0 > > Bloom Filter False Postives: 0 > > Bloom Filter False Ratio: 0.00000 > > Bloom Filter Space Used: 41104 > > Compacted row minimum size: 150 > > Compacted row maximum size: 179 > > Compacted row mean size: 179 * > > > > I am unable to see the effect of above setcachecapacity command. Let me > > know how i can configure the cache capacity, and check it's effect. > > > > With Regards, > > Amit > > > > -- > Jonathan Ellis > Project Chair, Apache Cassandra > co-founder of DataStax, the source for professional Cassandra support > http://www.datastax.com >
