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https://issues.apache.org/jira/browse/HIVE-26143?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Janos Kovacs reassigned HIVE-26143:
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> Performance enhancements for highly concurrent use-cases
> --------------------------------------------------------
>
> Key: HIVE-26143
> URL: https://issues.apache.org/jira/browse/HIVE-26143
> Project: Hive
> Issue Type: Improvement
> Components: Metastore
> Reporter: Janos Kovacs
> Assignee: Janos Kovacs
> Priority: Major
>
> These changes are from a recent high-concurrency test-run with
> - 4x HS2 (each with dedicated HMS instances), each with up to 2k sessions
> - 1x HS2 (with dedicated HMS instance) for housekeeping (~all background
> tasks)
> The tests brought two issues to the surface:
> - missing indexes caused long running queries in the backend database (with
> table scans) which then lead to query locks
> - the notification log cleaners can't be configured to a single node
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