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Posted to issues@hbase.apache.org by "Michael Drzal (JIRA)" <ji...@apache.org> on 2012/10/16 17:01:05 UTC

[jira] [Work started] (HBASE-6974) Metric for blocked updates

     [ https://issues.apache.org/jira/browse/HBASE-6974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on HBASE-6974 started by Michael Drzal.

> Metric for blocked updates
> --------------------------
>
>                 Key: HBASE-6974
>                 URL: https://issues.apache.org/jira/browse/HBASE-6974
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Lars Hofhansl
>            Assignee: Michael Drzal
>            Priority: Critical
>             Fix For: 0.94.3, 0.96.0
>
>
> When the disc subsystem cannot keep up with a sustained high write load, a region will eventually block updates to throttle clients.
> (HRegion.checkResources).
> It would be nice to have a metric for this, so that these occurrences can be tracked.

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