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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/05/13 08:00:31 UTC
[jira] [Work logged] (HIVE-24663) Batch process in
ColStatsProcessor for partitions.
[ https://issues.apache.org/jira/browse/HIVE-24663?focusedWorklogId=595957&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-595957 ]
ASF GitHub Bot logged work on HIVE-24663:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 13/May/21 08:00
Start Date: 13/May/21 08:00
Worklog Time Spent: 10m
Work Description: maheshk114 opened a new pull request #2266:
URL: https://github.com/apache/hive/pull/2266
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Issue Time Tracking
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Worklog Id: (was: 595957)
Remaining Estimate: 0h
Time Spent: 10m
> Batch process in ColStatsProcessor for partitions.
> --------------------------------------------------
>
> Key: HIVE-24663
> URL: https://issues.apache.org/jira/browse/HIVE-24663
> Project: Hive
> Issue Type: Improvement
> Reporter: Rajesh Balamohan
> Assignee: mahesh kumar behera
> Priority: Major
> Labels: performance
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When large number of partitions (>20K) are processed, ColStatsProcessor runs into DB issues.
> {{ db.setPartitionColumnStatistics(request);}} gets stuck for hours together and in some cases postgres stops processing.
> It would be good to introduce small batches for stats gathering in ColStatsProcessor instead of bulk update.
> Ref:
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/stats/ColStatsProcessor.java#L181
> https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/stats/ColStatsProcessor.java#L199
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