Re: Problem while configuring key and row cache?
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 With Regards, Amit On Tue, Aug 21, 2012 at 8:19 PM, Jonathan Ellis jbel...@gmail.com wrote: setcachecapacity is obsolete in 1.1+.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 25 0 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 0 25 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 25 25 ./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: 0.0 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
Problem while configuring key and row cache?
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 25 0 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 0 25 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 25 25 ./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: 0.0 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
Re: Problem while configuring key and row cache?
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 25 0 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 0 25 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 25 25 ./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: 0.0 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
Re: Problem while configuring key and row cache?
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 25 0 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 0 25 ./nodetool -h 107.108.189.204 setcachecapacity DemoUser Users 25 25 ./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: 0.0 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
