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From "Elliott Clark (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-7633) Add a metric that tracks the current number of used RPC threads on the regionservers
Date Thu, 15 Aug 2013 21:06:59 GMT

     [ https://issues.apache.org/jira/browse/HBASE-7633?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Elliott Clark resolved HBASE-7633.
----------------------------------

    Resolution: Fixed

0.96 will have descriptions of each of these metrics.
                
> Add a metric that tracks the current number of used RPC threads on the regionservers
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-7633
>                 URL: https://issues.apache.org/jira/browse/HBASE-7633
>             Project: HBase
>          Issue Type: Improvement
>          Components: metrics
>            Reporter: Joey Echeverria
>            Assignee: Elliott Clark
>
> One way to detect that you're hitting a "John Wayne" disk[1] would be if we could see
when region servers exhausted their RPC handlers. This would also be useful when tuning the
cluster for your workload to make sure that reads or writes were not starving the other operations
out.
> [1] http://hbase.apache.org/book.html#bad.disk

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