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https://issues.apache.org/jira/browse/HBASE-17016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15637793#comment-15637793
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Mikhail Antonov commented on HBASE-17016:
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I think in practice latency outliers are way more often used per server level
than per region level (unlike request rate)? Would be fine to remove/replace I
think.
> Reimplement per-region latency histogram metrics
> ------------------------------------------------
>
> Key: HBASE-17016
> URL: https://issues.apache.org/jira/browse/HBASE-17016
> Project: HBase
> Issue Type: Task
> Components: metrics
> Affects Versions: 2.0.0, 1.4.0
> Reporter: Andrew Purtell
> Fix For: 2.0.0, 1.4.0
>
>
> Follow up from HBASE-10656, where [~enis] says:
> {quote}
> the main problem is that we have A LOT of per-region metrics that are latency
> histograms. These latency histograms create many many Counter / LongAdder
> objects. We should get rid of per-region latencies and maybe look at reducing
> the per-region metric overhead.
> {quote}
> And [~ghelmling] gives us a good candidate to implement pre-region latency
> histograms [HdrHistogram|https://github.com/HdrHistogram/HdrHistogram].
> Let's consider removing the per-region latency histograms and reimplement
> using HdrHistogram.
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