Janos Kovacs created HIVE-26143:
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Summary: 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
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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