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Posted to issues@hive.apache.org by "Shohei Okumiya (Jira)" <ji...@apache.org> on 2024/10/16 01:26:00 UTC

[jira] [Updated] (HIVE-28549) Limit the maximum number of operators merged by SharedWorkOptimizer

     [ https://issues.apache.org/jira/browse/HIVE-28549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shohei Okumiya updated HIVE-28549:
----------------------------------
    Status: Patch Available  (was: Open)

PR

https://github.com/apache/hive/pull/5492

> Limit the maximum number of operators merged by SharedWorkOptimizer
> -------------------------------------------------------------------
>
>                 Key: HIVE-28549
>                 URL: https://issues.apache.org/jira/browse/HIVE-28549
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Physical Optimizer
>    Affects Versions: 4.0.0
>            Reporter: Shohei Okumiya
>            Assignee: Shohei Okumiya
>            Priority: Major
>
> Currently, SharedWorkOptimizer can merge as many number of operator trees as possible. This unbounded optimization can push memory pressure to a task, or can cause performance problems because a single vertex has to process many operations.



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