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https://issues.apache.org/jira/browse/HIVE-23949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesus Camacho Rodriguez resolved HIVE-23949.
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Fix Version/s: 4.0.0
Resolution: Fixed
Pushed to master, thanks [~soumyakanti.das]!
> Introduce caching layer in HS2 to accelerate query compilation
> --------------------------------------------------------------
>
> Key: HIVE-23949
> URL: https://issues.apache.org/jira/browse/HIVE-23949
> Project: Hive
> Issue Type: New Feature
> Components: HiveServer2
> Reporter: Soumyakanti Das
> Assignee: Soumyakanti Das
> Priority: Minor
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> One of the major contributors to compilation latency is the retrieval of
> metadata from HMS. This JIRA introduces a caching layer in HS2 for this
> metadata. Its design is simple, relying on snapshot information being queried
> to cache and invalidate the metadata. This will help us to reduce the time
> spent in compilation by using HS2 memory more effectively, and it will allow
> us to improve HMS throughput for multi-tenant workloads by reducing the
> number of calls it needs to serve.
> This patch only caches partition retrieval information, which is often one of
> the most costly metadata operations. It also sets the foundation to cache
> additional calls in follow-up work.
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