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Posted to issues-all@impala.apache.org by "Qifan Chen (Jira)" <ji...@apache.org> on 2020/09/18 14:49:00 UTC

[jira] [Created] (IMPALA-10178) Run-time profile shall report skews

Qifan Chen created IMPALA-10178:
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             Summary: Run-time profile shall report skews
                 Key: IMPALA-10178
                 URL: https://issues.apache.org/jira/browse/IMPALA-10178
             Project: IMPALA
          Issue Type: Improvement
            Reporter: Qifan Chen


Currently per fragment,  in addition to fragment instance profile, only an average profile is provided.  One has to go over fragment instance profiles to figure out whether there exist skews. By skews we mean certain operator instances process much more rows than others for the same fragment. 

It will be useful if skew information can be provided in the run-time profile. 



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