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