Lars Hofhansl created HBASE-6974:
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             Summary: Metric blocked updates
                 Key: HBASE-6974
                 URL: https://issues.apache.org/jira/browse/HBASE-6974
             Project: HBase
          Issue Type: Bug
            Reporter: Lars Hofhansl
             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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