stack created HBASE-7631:
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Summary: Region w/ few, fat reads was hard to find on a box
carrying hundreds of regions
Key: HBASE-7631
URL: https://issues.apache.org/jira/browse/HBASE-7631
Project: HBase
Issue Type: Bug
Components: metrics
Reporter: stack
Of a sudden on a prod cluster, a table's rows gained girth... hundreds of
thousands of rows... and the application was pulling them all back every time
but only once a second or so. Regionserver was carrying hundreds of regions.
Was plain that there was lots of network out traffic. It was tough figuring
which region was the culprit (JD's trick was moving the regions off one at a
time while watching network out traffic on cluster to see whose spiked next --
it worked but just some time).
If we had per region read/write sizes in metrics, that would have saved a bunch
of diagnostic time.
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