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https://issues.apache.org/jira/browse/HBASE-21777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16833056#comment-16833056
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Duo Zhang commented on HBASE-21777:
-----------------------------------
I think one reason for keeping the log message even when the throughput is not
changed is that, we can make sure that the controller is still alive. If we do
not see this message for a long time then there must be something wrong...
Not a big deal, you can commit if you do not think this is a strong enough
reason.
> "Tune compaction throughput" debug messages even when nothing has changed
> --------------------------------------------------------------------------
>
> Key: HBASE-21777
> URL: https://issues.apache.org/jira/browse/HBASE-21777
> Project: HBase
> Issue Type: Bug
> Components: Compaction
> Affects Versions: 1.5.0
> Reporter: Andrew Purtell
> Assignee: Tak Lon (Stephen) Wu
> Priority: Trivial
> Labels: branch-1
> Fix For: 1.5.0
>
>
> PressureAwareCompactionThroughputController will log "tune compaction
> throughput" debug messages even when after consideration the re-tuning makes
> no change to current settings. In that case it would be better not to log
> anything.
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