[jira] [Resolved] (IMPALA-6460) More flexible memory-based admission control policies

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

     [ https://issues.apache.org/jira/browse/IMPALA-6460?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tim Armstrong resolved IMPALA-6460.
-----------------------------------
    Fix Version/s: Impala 4.0
       Resolution: Fixed

> More flexible memory-based admission control policies
> -----------------------------------------------------
>
>                 Key: IMPALA-6460
>                 URL: https://issues.apache.org/jira/browse/IMPALA-6460
>             Project: IMPALA
>          Issue Type: Epic
>          Components: Distributed Exec
>    Affects Versions: Impala 2.11.0
>            Reporter: Tim Armstrong
>            Priority: Major
>              Labels: admission-control
>             Fix For: Impala 4.0
>
>
> Currently there are only two ways to decided how much memory to reserve for each query in memory-based admission control:
> * Using the memory estimates, which often makes bad decisions (e.g. huge overestimates) and doesn't have any enforcement on the backend
> * Using a static pool or user-set mem_limit, which is very difficult to set to a reasonable value for all queries.
> The memory reservation work will allow us to come up with more powerful and flexible polices



--
This message was sent by Atlassian Jira
(v8.3.4#803005)