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https://issues.apache.org/jira/browse/HIVE-16520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15989246#comment-15989246
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ASF GitHub Bot commented on HIVE-16520:
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GitHub user daijyc opened a pull request:
https://github.com/apache/hive/pull/173
HIVE-16520: Cache hive metadata in metastore
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/daijyc/hive master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/hive/pull/173.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #173
----
commit 24fed179e00b1f323e218b2eba2c07ab5124a9e3
Author: Daniel Dai <[email protected]>
Date: 2017-04-28T00:08:11Z
HIVE-16520: Cache hive metadata in metastore
----
> 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
> Attachments: HIVE-16520-1.patch, HIVE-16520-proto-2.patch,
> HIVE-16520-proto.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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