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https://issues.apache.org/jira/browse/HIVE-25768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Sherman updated HIVE-25768:
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Summary: Extend query-level HMS cache lifetime beyond analysis stage (was:
Extended query-level HMS cache lifetime beyond analysis stage)
> Extend query-level HMS cache lifetime beyond analysis stage
> -----------------------------------------------------------
>
> Key: HIVE-25768
> URL: https://issues.apache.org/jira/browse/HIVE-25768
> Project: Hive
> Issue Type: Improvement
> Components: HiveServer2
> Reporter: John Sherman
> Assignee: John Sherman
> Priority: Major
>
> HIVE-24176 added a HMS response cache to improve compilation times when
> metadata is requested multiple times. The cache gets destroyed after
> analysis. If we extend the lifetime of the cache beyond analysis it could be
> used to reduce HMS communication for other areas such as various exec hooks
> that inspect the metadata for a query.
> The impetus that motivated this change is specifically the Atlas hook which
> generates lineage information and makes HMS calls. These calls to HMS can add
> latency to query results.
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