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Posted to hdfs-dev@hadoop.apache.org by "Lars Hofhansl (JIRA)" <ji...@apache.org> on 2013/11/27 02:18:35 UTC

[jira] [Created] (HDFS-5571) postScannerFilterRow consumes a lot of CPU in tall table scans

Lars Hofhansl created HDFS-5571:
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             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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