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Posted to issues@hive.apache.org by "Jesus Camacho Rodriguez (JIRA)" <ji...@apache.org> on 2019/03/06 22:49:00 UTC
[jira] [Work started] (HIVE-21399) Adjust
hive.map.aggr.hash.min.reduction statically depending on group by
statistics
[ https://issues.apache.org/jira/browse/HIVE-21399?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on HIVE-21399 started by Jesus Camacho Rodriguez.
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> Adjust hive.map.aggr.hash.min.reduction statically depending on group by statistics
> -----------------------------------------------------------------------------------
>
> Key: HIVE-21399
> URL: https://issues.apache.org/jira/browse/HIVE-21399
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Reporter: Jesus Camacho Rodriguez
> Assignee: Jesus Camacho Rodriguez
> Priority: Major
>
> Currently, the value is set statically from config variable. If stats are available, we could try to adjust this value at optimization time to favor turning off hash aggregation earlier.
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