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https://issues.apache.org/jira/browse/HIVE-23953?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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mahesh kumar behera resolved HIVE-23953.
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Resolution: Fixed
> Use task counter information to compute keycount during hashtable loading
> -------------------------------------------------------------------------
>
> Key: HIVE-23953
> URL: https://issues.apache.org/jira/browse/HIVE-23953
> Project: Hive
> Issue Type: Bug
> Reporter: Rajesh Balamohan
> Assignee: mahesh kumar behera
> Priority: Major
> Labels: pull-request-available
> Time Spent: 40m
> Remaining Estimate: 0h
>
> There are cases when compiler misestimates key count and this results in a
> number of hashtable resizes during runtime.
> [https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/exec/vector/mapjoin/fast/VectorMapJoinFastHashTableLoader.java#L128]
> In such cases, it would be good to get "approximate_input_records" (TEZ-4207)
> counter from upstream to compute the key count more accurately at runtime.
>
> *
> *
> Options
> h4.
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