Hi All, I'm running three cassandra 0.7.4 nodes in a cluster, and I give 2G memory to each node.
Now, I get the cfstats here: Keyspace: UserMap Read Count: 38411 Read Latency: 123.54214613001484 ms. Write Count: 44155 Write Latency: 0.02341093873853471 ms. Pending Tasks: 0 Column Family: Map SSTable count: 3 Space used (live): 32704387 Space used (total): 32704387 Memtable Columns Count: 49 Memtable Data Size: 3348 Memtable Switch Count: 56 Read Count: 38411 Read Latency: 123.542 ms. Write Count: 44155 Write Latency: 0.023 ms. Pending Tasks: 0 Key cache capacity: 200000 Key cache size: 611 Key cache hit rate: 0.9294361241314483 Row cache: disabled Compacted row minimum size: 125 Compacted row maximum size: 17436917 Compacted row mean size: 147647 You can find that the Read Latency is really high here, so what can I do to reduce the latency? Give more memory to the three nodes? Any other options? Thanks. -- Dikang Gu 0086 - 18611140205
