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https://issues.apache.org/jira/browse/IMPALA-13754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy updated IMPALA-13754:
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Target Version: Impala 5.0.0
> Simplify ScheduleState::UpdateMemoryRequirements
> ------------------------------------------------
>
> Key: IMPALA-13754
> URL: https://issues.apache.org/jira/browse/IMPALA-13754
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Reporter: Riza Suminto
> Priority: Major
>
> ScheduleState::UpdateMemoryRequirements is very complex, covering multitudes
> of possible tuning knobs.
> [https://github.com/apache/impala/blob/c9e9f86c0536f0991f70613675bbcfbbccc6a324/be/src/scheduling/schedule-state.cc#L298]
>
> We should simplify this by:
> # Drop mimic_old_behaviour.
> # If pool_cfg.clamp_mem_limit_query_option is True, assert that
> 0 < pool_cfg.min_query_mem_limit < pool_cfg.max_query_mem_limit
> # Drop FLAGS_clamp_query_mem_limit_backend_mem_limit logic.
> The success criteria is if we can reduce enum MemLimitSourcePB usage.
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