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https://issues.apache.org/jira/browse/HIVE-24663?focusedWorklogId=601063&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-601063
]
ASF GitHub Bot logged work on HIVE-24663:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/May/21 08:36
Start Date: 24/May/21 08:36
Worklog Time Spent: 10m
Work Description: maheshk114 commented on a change in pull request #2266:
URL: https://github.com/apache/hive/pull/2266#discussion_r637782731
##########
File path: ql/src/test/queries/clientpositive/columnstats_partlvl_dp.q
##########
@@ -70,3 +70,9 @@ describe formatted Employee_n0 partition
(employeeSalary='6000.0', country='UK')
describe formatted Employee_n0 partition (employeeSalary='6000.0',
country='UK') c;
describe formatted Employee_n0 partition (employeeSalary='6000.0',
country='UK') d;
+analyze table Employee_n0 partition (employeeSalary,country) compute
statistics for columns;
+
+describe formatted Employee_n0 partition (employeeSalary='6000.0',
country='UK') employeeName;
+describe formatted Employee_n0 partition (employeeSalary='6000.0',
country='UK') c;
+describe formatted Employee_n0 partition (employeeSalary='6000.0',
country='UK') d;
Review comment:
done
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Issue Time Tracking
-------------------
Worklog Id: (was: 601063)
Time Spent: 2h 20m (was: 2h 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, pull-request-available
> Time Spent: 2h 20m
> 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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