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https://issues.apache.org/jira/browse/HIVE-16520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HIVE-16520:
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    Labels: TODOC3.0 pull-request-available  (was: TODOC3.0)

> Cache hive metadata in metastore
> --------------------------------
>
>                 Key: HIVE-16520
>                 URL: https://issues.apache.org/jira/browse/HIVE-16520
>             Project: Hive
>          Issue Type: New Feature
>          Components: Metastore
>            Reporter: Daniel Dai
>            Assignee: Daniel Dai
>            Priority: Major
>              Labels: TODOC3.0, pull-request-available
>             Fix For: 3.0.0
>
>         Attachments: HIVE-16520-1.patch, HIVE-16520-proto-2.patch, 
> HIVE-16520-proto.patch, HIVE-16520.2.patch, HIVE-16520.3.patch, 
> HIVE-16520.4.patch
>
>
> During Hive 2 benchmark, we find Hive metastore operation take a lot of time 
> and thus slow down Hive compilation. In some extreme case, it takes much 
> longer than the actual query run time. Especially, we find the latency of 
> cloud db is very high and 90% of total query runtime is waiting for metastore 
> SQL database operations. Based on this observation, the metastore operation 
> performance will be greatly enhanced if we have a memory structure which 
> cache the database query result.



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