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Posted to issues@impala.apache.org by "Tim Armstrong (JIRA)" <ji...@apache.org> on 2018/10/26 00:55:00 UTC

[jira] [Resolved] (IMPALA-3706) Planner should set min/max per-node buffer pool reservations to optimize query performance

     [ https://issues.apache.org/jira/browse/IMPALA-3706?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-3706.
-----------------------------------
    Resolution: Later

Unclear if this is the right direction. Needs more thought.

> Planner should set min/max per-node buffer pool reservations to optimize query performance
> ------------------------------------------------------------------------------------------
>
>                 Key: IMPALA-3706
>                 URL: https://issues.apache.org/jira/browse/IMPALA-3706
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Frontend
>    Affects Versions: Impala 2.7.0
>            Reporter: Tim Armstrong
>            Priority: Minor
>              Labels: planner, resource-management
>
> Once we have the appropriate min/max reservation mechanisms in-place (IMPALA-3200), we should make use of them to optimise for query performance given a memory budget.
> E.g. we should preferentially allocate memory to merge aggregations over preaggregations to reduce or avoid spilling.



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