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