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Posted to issues-all@impala.apache.org by "Michael Smith (Jira)" <ji...@apache.org> on 2025/03/19 20:15:00 UTC

[jira] [Closed] (IMPALA-13201) Queries Against System Tables Must Not Be Subject to Admission Control

     [ https://issues.apache.org/jira/browse/IMPALA-13201?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Smith closed IMPALA-13201.
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    Resolution: Fixed

> Queries Against System Tables Must Not Be Subject to Admission Control
> ----------------------------------------------------------------------
>
>                 Key: IMPALA-13201
>                 URL: https://issues.apache.org/jira/browse/IMPALA-13201
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Jason Fehr
>            Assignee: Jason Fehr
>            Priority: Critical
>              Labels: workload-management
>             Fix For: Impala 4.5.0
>
>
> Impala system tables are in-memory coordinator-only virtual tables without any backing of data on disk.  Currently, the only system table is sys.impala_query_live.  Since these tables only exist in coordinator memory, queries that only select from these tables do not need to by subject to admission control.
> Modify Impala so that queries that only reference system tables are not subject to admission control and can run if there is enough available memory on the coordinator.



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