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Posted to issues-all@impala.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2025/05/10 02:51:00 UTC

[jira] [Commented] (IMPALA-13486) Improve memory estimation and allocation for queries on complex types

    [ https://issues.apache.org/jira/browse/IMPALA-13486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17950627#comment-17950627 ] 

Quanlong Huang commented on IMPALA-13486:
-----------------------------------------

Created a separate Jira for MemPool improvement to tackle the TCMalloc contention issue: IMPALA-14064

> Improve memory estimation and allocation for queries on complex types
> ---------------------------------------------------------------------
>
>                 Key: IMPALA-13486
>                 URL: https://issues.apache.org/jira/browse/IMPALA-13486
>             Project: IMPALA
>          Issue Type: Improvement
>            Reporter: Manish Maheshwari
>            Priority: Critical
>
> Improve memory estimation and allocation for queries on complex types taking into account the number of values in the complex type and any functions like unnest that would consume a lot of memory. 
> Currently underestimating memory causes a lot of tcmalloc calls and the query get blocked waiting for tcmalloc central freelist.
>  



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