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From "HBase Review Board (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-3102) Enhance HBase rMetrics for Long-running Stats
Date Tue, 26 Oct 2010 23:44:22 GMT

    [ https://issues.apache.org/jira/browse/HBASE-3102?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12925200#action_12925200

HBase Review Board commented on HBASE-3102:

Message from: "Gary Helmling" <ghelmling@gmail.com>

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Ship it!

Based on discussion in JIRA, I'm fine addressing naming issue mentioned later.  FWIW, has
my approval.  Ship it!

- Gary

> Enhance HBase rMetrics for Long-running Stats
> ---------------------------------------------
>                 Key: HBASE-3102
>                 URL: https://issues.apache.org/jira/browse/HBASE-3102
>             Project: HBase
>          Issue Type: Improvement
>          Components: regionserver
>            Reporter: Nicolas Spiegelberg
>            Assignee: Nicolas Spiegelberg
>             Fix For: 0.90.0
>         Attachments: HBASE-3102_90.patch
> Example: a useful metric to observe track is compaction count + duration. Since compactions
are long running and only happen infrequently, the avg/opcount stats are should be reset longer
than the default polling period (5 sec). In addition to 'hbase.period', we should allow a
different duration after which long-running metrics should expire. This would also fix our
existing metrics problem where min/max stats are never reset until the process is restarted/upgraded.

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