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https://issues.apache.org/jira/browse/HIVE-25178?focusedWorklogId=729165&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-729165
]
ASF GitHub Bot logged work on HIVE-25178:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 17/Feb/22 18:59
Start Date: 17/Feb/22 18:59
Worklog Time Spent: 10m
Work Description: sourabh912 opened a new pull request #3042:
URL: https://github.com/apache/hive/pull/3042
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### What changes were proposed in this pull request?
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Enabling the property hive.load.dynamic.partitions.scan.specific.partitions
othewise a user sees significant performance degradation in insert/insert
overwrite queries for large partitioned tables
### Why are the changes needed?
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Improves performance for insert/insert overwrite queries for large
partitioned tables.
### Does this PR introduce _any_ user-facing change?
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No
### How was this patch tested?
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Relying on existing tests since it is just a configuration change.
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Issue Time Tracking
-------------------
Worklog Id: (was: 729165)
Time Spent: 0.5h (was: 20m)
> Reduce number of getPartition calls during loadDynamicPartitions for External
> Tables
> ------------------------------------------------------------------------------------
>
> Key: HIVE-25178
> URL: https://issues.apache.org/jira/browse/HIVE-25178
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Reporter: Rajesh Balamohan
> Assignee: Narayanan Venkateswaran
> Priority: Major
> Labels: performance, pull-request-available
> Attachments:
> 0001-HIVE-25178-Reduce-number-of-getPartition-calls-durin.patch
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> When dynamic partitions are loaded, Hive::loadDynamicPartition loads all
> partitions from HMS causing heavy load on it. This becomes worse when large
> number of partitions are present in tables.
> Only relevant partitions being loaded in dynamic partitions can be queried
> from HMS for partition existence.
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/metadata/Hive.java#L2958]
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