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https://issues.apache.org/jira/browse/HBASE-4766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13148146#comment-13148146
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stack commented on HBASE-4766:
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Nicolas, do you have a patch even if it does not apply to trunk (or should I
just look for it over in 0.89fb?). I was thinking we need this just yesterday.
If you put up a patch, it'd be a clue on how we might do this against trunk.
> Add Instrumentation for Put Latencies at Critical Paths
> -------------------------------------------------------
>
> Key: HBASE-4766
> URL: https://issues.apache.org/jira/browse/HBASE-4766
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.94.0
> Reporter: Nicolas Spiegelberg
>
> Part of 89-fb to 92 port. Add instrumentation to collect:
> - memstore insert time
> - RWCC wait time (the time we wait after an write operation to, for RWCC read
> point to advance).
> - row lock acquisition time
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