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From "Elliott Clark (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-3614) Expose per-region request rate metrics
Date Thu, 19 Apr 2012 20:20:40 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3614?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Elliott Clark updated HBASE-3614:
---------------------------------

    Attachment: HBASE-3614-6.patch

Added the final to OperationMetrics.
                
> Expose per-region request rate metrics
> --------------------------------------
>
>                 Key: HBASE-3614
>                 URL: https://issues.apache.org/jira/browse/HBASE-3614
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics, regionserver
>            Reporter: Gary Helmling
>            Assignee: Elliott Clark
>            Priority: Minor
>         Attachments: HBASE-3614-0.patch, HBASE-3614-1.patch, HBASE-3614-2.patch, HBASE-3614-3.patch,
HBASE-3614-4.patch, HBASE-3614-5.patch, HBASE-3614-6.patch, Screen Shot 2012-04-17 at 2.41.27
PM.png
>
>
> We currently export metrics on request rates for each region server, and this can help
with identifying uneven load at a high level. But once you see a given server under high load,
you're forced to extrapolate based on your application patterns and the data it's serving
what the likely culprit is.  This can and should be much easier if we just exported request
rate metrics per-region on each server.
> Dynamically updating the metrics keys based on assigned regions may pose some minor challenges,
but this seems a very valuable diagnostic tool to have available.

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