Rajesh Balamohan created HIVE-24663:
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Summary: Batch process in ColStatsProcessor
Key: HIVE-24663
URL: https://issues.apache.org/jira/browse/HIVE-24663
Project: Hive
Issue Type: Improvement
Reporter: Rajesh Balamohan
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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