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Posted to issues-all@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2020/01/23 21:11:00 UTC

[jira] [Updated] (IMPALA-9255) Avoid unnecessary concurrent resource consumption by fragments.

     [ https://issues.apache.org/jira/browse/IMPALA-9255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong updated IMPALA-9255:
----------------------------------
    Summary: Avoid unnecessary concurrent resource consumption by fragments.  (was: Take plan dependencies into account for resource consumption)

> Avoid unnecessary concurrent resource consumption by fragments.
> ---------------------------------------------------------------
>
>                 Key: IMPALA-9255
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9255
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Frontend
>            Reporter: Tim Armstrong
>            Priority: Major
>              Labels: multithreading
>
> In Planner.computeResourceReqs(), we assume that all fragment's peak resource consumption occurs at the same time. In actually, with the separate join build, there are dependencies between fragments and we could take those into account to reduce the estimated resource requirements.



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