On 2017-07-05 14:32 (-0700), Jay Zhuang <jay.zhu...@yahoo.com.INVALID> wrote: > Hi, > > commitlog_total_space_in_mb is increased from 1G to 8G in > CASSANDRA-7031. Sometimes we saw the number of dropped mutations spikes. > Not sure if it's a sign that we should increase the > commitlog_total_space_in_mb?
8G seems pretty typical. The real litmus test is in Benedict's comment: > We can find that we force memtable flushes as a result of log utilisation > instead of memtable occupancy quite often Are your memtable flushes because the memtable is full, or because the commitlog is full? Also, what version are you running, and do you have segment recycling enabled? (hopefully not: https://issues.apache.org/jira/browse/CASSANDRA-8771 ) --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org For additional commands, e-mail: user-h...@cassandra.apache.org