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Posted to issues-all@impala.apache.org by "Qifan Chen (Jira)" <ji...@apache.org> on 2020/10/21 13:21:00 UTC

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

     [ https://issues.apache.org/jira/browse/IMPALA-10178?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Qifan Chen closed IMPALA-10178.
-------------------------------
    Fix Version/s: Impala 4.0
       Resolution: Fixed

> 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
>            Assignee: Qifan Chen
>            Priority: Minor
>             Fix For: Impala 4.0
>
>
> 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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