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From "Duo Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-17016) Reimplement per-region latency histogram metrics
Date Fri, 04 Nov 2016 01:49:59 GMT

     [ https://issues.apache.org/jira/browse/HBASE-17016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Duo Zhang updated HBASE-17016:
------------------------------
    Description: 
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.

  was:
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 his
Let's consider removing the per-region latency histograms until we have a low impact (in time
and space) accounting.


> Reimplement per-region latency histogram metrics
> ------------------------------------------------
>
>                 Key: HBASE-17016
>                 URL: https://issues.apache.org/jira/browse/HBASE-17016
>             Project: HBase
>          Issue Type: Task
>            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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