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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-5571) postScannerFilterRow consumes a lot of CPU in tall table scans
Date Wed, 27 Nov 2013 01:18:35 GMT
Lars Hofhansl created HDFS-5571:
-----------------------------------

             Summary: postScannerFilterRow consumes a lot of CPU in tall table scans
                 Key: HDFS-5571
                 URL: https://issues.apache.org/jira/browse/HDFS-5571
             Project: Hadoop HDFS
          Issue Type: Bug
            Reporter: Lars Hofhansl


Continuing my profiling quest, I find that in scanning tall table (and filtering everything
on the server) a quarter of the time is now spent in the postScannerFilterRow coprocessor
hook.




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