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From "Doug Meil (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-3869) RegionServer metrics - add read and write byte-transfer statistics
Date Mon, 09 May 2011 17:42:03 GMT
RegionServer metrics - add read and write byte-transfer statistics

                 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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