What consistency are you asking for? On Fri, May 20, 2011 at 7:42 AM, Dikang Gu <dikan...@gmail.com> wrote: > 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 >
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