Use info…. $ bin/nodetool -h localhost info … Key Cache : size 672 (bytes), capacity 52428768 (bytes), 12 hits, 17 requests, 0.706 recent hit rate, 14400 save period in seconds Row Cache : size 0 (bytes), capacity 0 (bytes), 0 hits, 0 requests, NaN recent hit rate, 0 save period in seconds
Cheers ----------------- Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 22/08/2012, at 5:18 PM, Amit Handa <amithand...@gmail.com> wrote: > 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 setcachecapacity is obsolete in 1.1+.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 >>
