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