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https://issues.apache.org/jira/browse/HIVE-3990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13818388#comment-13818388
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Lefty Leverenz commented on HIVE-3990:
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* hive.fetch.task.conversion.threshold needs to be documented in the wiki:
[Configuration
Properties|https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties].
* hive.fetch.task.aggr also needs to be documented. It isn't in
hive-default.xml.template or the wiki, but it's in HiveConf.java. Apparently
it was added in Hive 0.12.0 (HIVE-4002, Fetch task aggregation for simple group
by query).
I can add these two parameters to the wiki if someone agrees to review them.
But adding hive.fetch.task.aggr to hive-default.xml.template requires a new
JIRA, unless it gets piggybacked onto HIVE-5498 (open, unassigned: Merge
metadata only optimizer into simple fetch optimizer).
> Provide input threshold for direct-fetcher (HIVE-2925)
> ------------------------------------------------------
>
> Key: HIVE-3990
> URL: https://issues.apache.org/jira/browse/HIVE-3990
> Project: Hive
> Issue Type: Improvement
> Components: Query Processor
> Reporter: Navis
> Assignee: Navis
> Priority: Trivial
> Fix For: 0.13.0
>
> Attachments: D8415.2.patch, D8415.3.patch, HIVE-3990.D8415.1.patch
>
>
> As a followup of HIVE-2925, add input threshold for fetch task conversion.
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