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From "Nicolas Spiegelberg (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4038) Hot Region Diagnosis
Date Mon, 27 Jun 2011 22:47:29 GMT
Hot Region Diagnosis
--------------------

                 Key: HBASE-4038
                 URL: https://issues.apache.org/jira/browse/HBASE-4038
             Project: HBase
          Issue Type: Improvement
          Components: client, regionserver
    Affects Versions: 0.92.0
            Reporter: Nicolas Spiegelberg
            Assignee: Nicolas Spiegelberg
            Priority: Minor


We should provide a basic way for end users to operationally diagnose hot row problems.  Thinking
about a 2-phase approach:

1. Diagnose hot regions
2. Inspect those regions/servers to find the hot rows.

To diagnose hot regions, we could query the master or regionservers for these regions + sort.
 To inspect the regions for hot rows, we could write another script to analyze the HLogs on
a server and basically do: sort log|uniq -n|sort -n|top

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