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https://issues.apache.org/jira/browse/HBASE-19285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16271834#comment-16271834
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Andrew Purtell commented on HBASE-19285:
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No, it's not too late for 1.4. We might take them out if they show up as a 
hotspot or perf issue, though, if that's ok.


> Add per-table latency histograms
> --------------------------------
>
>                 Key: HBASE-19285
>                 URL: https://issues.apache.org/jira/browse/HBASE-19285
>             Project: HBase
>          Issue Type: Bug
>          Components: metrics
>            Reporter: Clay B.
>            Assignee: Josh Elser
>            Priority: Critical
>             Fix For: 2.0.0, 1.4.0, 1.3.3
>
>         Attachments: HBASE-19285.001.branch-1.3.patch, 
> HBASE-19285.002.branch-1.3.patch, HBASE-19285.003.branch-1.3.patch, 
> HBaseTableLatencyMetrics.png
>
>
> HBASE-17017 removed the per-region latency histograms (e.g. Get, Put, Scan at 
> p75, p85, etc)
> HBASE-15518 added some per-table metrics, but not the latency histograms.
> Given the previous conversations, it seems like it these per-table 
> aggregations weren't intentionally omitted, just never re-implemented after 
> the per-region removal. They're some really nice out-of-the-box metrics we 
> can provide to our users/admins as long as it's not detrimental.



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