RegionServer metrics - add read and write byte-transfer statistics
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Key: HBASE-3869
URL: https://issues.apache.org/jira/browse/HBASE-3869
Project: HBase
Issue Type: Improvement
Reporter: Doug Meil
Priority: Minor
It would be beneficial to have the "data transfer weight" of reads and writes
per region server.
HBASE-3647 split out the read/write metric requests from the uber-"request"
metric - which is great.
But there isn't a notion of "data transfer weight" and this is why it's
important: the read metrics are effectively RPC-based. Thus, with a scan
caching of 500, there is 1 RPC call every 500 rows read (and 1 'read' metric
increment). And this metric doesn't indicate how much data is being
transferred (e.g., a read with 50 attributes will probably cost a lot more than
a read with 50 attributes).
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