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https://issues.apache.org/jira/browse/HBASE-6974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13477961#comment-13477961
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Michael Drzal commented on HBASE-6974:
--------------------------------------
I think I addressed all of your concerns except for the placement of
currentTimeMillis. Let me know if I understood you correctly, and if so, I can
make the switch.
> 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
>
> Attachments: HBASE-6974.patch, HBASE-6974-v2.patch
>
>
> 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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