[jira] [Resolved] (IMPALA-4679) Impala to set query mem_limit automatically for compute stats

["Tim Armstrong (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-4679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-4679.
-----------------------------------
    Resolution: Duplicate

I don't think we want to do a one-off for compute stats - the general solution we're taking is to impose better memory constraints on all operators. Then we'll be able to have better admission control policies.

> Impala to set query mem_limit automatically for compute stats
> -------------------------------------------------------------
>
>                 Key: IMPALA-4679
>                 URL: https://issues.apache.org/jira/browse/IMPALA-4679
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend, Frontend
>    Affects Versions: Impala 2.8.0
>            Reporter: Alan Choi
>            Assignee: Marcel Kornacker
>
> With Multi-threading turned on for Compute Stats, the memory usage in the SCAN is a lot more deterministic. In fact, the memory usage in SCAN and AGG can be pre-determined in the planner. Therefore, it is feasible to set the mem_limit automatically for compute stats query.



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