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From Meg Mara <mm...@digitalriver.com>
Subject Commit Log sync problems
Date Thu, 07 Mar 2019 16:33:07 GMT
Hello all,

I recently upgraded from C* 3.0.10 to 3.0.16 and have been receiving these warnings about
Commit-Log durations being longer than the configured interval. I don't understand what the
problem is, why is the system complaining about such small sync durations? Please advice.

Here are some warnings:


3:WARN  [PERIODIC-COMMIT-LOG-SYNCER] 2019-03-07 13:32:23,785 NoSpamLogger.java:94 - Out of
2750 commit log syncs over the past 274s with average duration of 0.66ms, 4 have exceeded
the configured commit interval by an average of 22.50ms



2:WARN  [PERIODIC-COMMIT-LOG-SYNCER] 2019-03-07 13:27:01,214 NoSpamLogger.java:94 - Out of
1 commit log syncs over the past 0s with average duration of 113.00ms, 1 have exceeded the
configured commit interval by an average of 13.00ms


Node's cassandra.yaml setting related to Commit-Log:

commit_failure_policy: stop
commitlog_directory: /cassandra/log
commitlog_segment_size_in_mb: 32
commitlog_sync: periodic
commitlog_sync_period_in_ms: 10000
commitlog_total_space_in_mb: 4096

Thank you,
Meg Mara



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