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https://issues.apache.org/jira/browse/HIVE-25014?focusedWorklogId=628102&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-628102
]
ASF GitHub Bot logged work on HIVE-25014:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 27/Jul/21 02:00
Start Date: 27/Jul/21 02:00
Worklog Time Spent: 10m
Work Description: rbalamohan opened a new pull request #2533:
URL: https://github.com/apache/hive/pull/2533
### Why are the changes needed?
https://issues.apache.org/jira/browse/HIVE-25014
Table details were fetched multiple times within column stats updation.
Depending on the width of the table, this was called multiple times. Datanuc*
moves from persistent -> detached state on commit.
https://www.datanucleus.org/products/accessplatform_4_2/jpa/object_lifecycle.html.
Since we commit at the end of all processing, fetching table details once is
good enough.
### Does this PR introduce _any_ user-facing change?
No
### How was this patch tested?
small internal cluster
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Issue Time Tracking
-------------------
Worklog Id: (was: 628102)
Remaining Estimate: 0h
Time Spent: 10m
> Optimise ObjectStore::updateTableColumnStatistics
> -------------------------------------------------
>
> Key: HIVE-25014
> URL: https://issues.apache.org/jira/browse/HIVE-25014
> Project: Hive
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> "ObjectStore::updateTableColumnStatistics" fetches table level details
> multiple times. Need to consider reducing the getTable lookups to avoid
> pressure on HMS.
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