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The "PerformanceTuning" page has been changed by FlipKromer. http://wiki.apache.org/cassandra/PerformanceTuning?action=diff&rev1=6&rev2=7 -------------------------------------------------- + = Improving write performance = + 1. Make sure your commit log and data dirs (sstables) are on different disks. + 1. There isn't really a step 2. Writes go into the commitlog (fast) and straight into memory (really fast) and can't really be sped up beyond that. + + If you're seeing huge latency spikes under write-heavy loads, that's due to other factors. It's a 'fix what has gone horribly wrong' problem, not a 'tune for better peak performance' problem. + + = Improving read performance = Be sure to review the page on [[MemtableThresholds|Memtable Thresholds]] -- several important configuration and system settings are described there. === Lessen overall system impact of Compactions ===
