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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5786) Implement histogram metrics for flush and compaction latencies and sizes.
Date Fri, 13 Apr 2012 22:45:17 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13253831#comment-13253831

Todd Lipcon commented on HBASE-5786:

Or even keep a round robin buffer of the last 1000 such operations? It would be a miniscule
amount of RAM to track this, right?
> Implement histogram metrics for flush and compaction latencies and sizes.
> -------------------------------------------------------------------------
>                 Key: HBASE-5786
>                 URL: https://issues.apache.org/jira/browse/HBASE-5786
>             Project: HBase
>          Issue Type: New Feature
>          Components: metrics, regionserver
>    Affects Versions: 0.92.2, 0.94.0, 0.96.0
>            Reporter: Jonathan Hsieh
>            Assignee: Shaneal Manek
> Average time for region operations doesn't really tell a useful story when that help
diagnose anomalous conditions.
> It would be extremely useful to add histogramming metrics similar to HBASE-5533 for region
operations like flush, compaction and splitting.  The probably should be forward biased at
a much coarser granularity however (maybe decay every day?) 

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