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https://issues.apache.org/jira/browse/IMPALA-7162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16512871#comment-16512871
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Dan Hecht commented on IMPALA-7162:
-----------------------------------
To add to the clarification, regarding idle_session_timeout, I think we
actually want to recommend idle_session_timeout less now that
idle_query_timeout works to free up resources. (Or at least not recommend it
for the reason of cleaning up query resources).
> [DOCS] idle_query_timeout setting in Impala needs more clarification
> --------------------------------------------------------------------
>
> Key: IMPALA-7162
> URL: https://issues.apache.org/jira/browse/IMPALA-7162
> Project: IMPALA
> Issue Type: Documentation
> Components: Docs
> Affects Versions: Impala 2.6.0
> Reporter: Laurel Hale
> Priority: Minor
> Labels: documentation
>
> This Jira is created on behalf of Sudarshan Sharma:
> 1) Please refer to the following Impala documentation:
> [http://impala.apache.org/docs/build3x/html/topics/impala_timeouts.html]
> 2) Please see the section where idle_query_timeout is explained.
> *************************
> Request:-
> *************************
> We've mentioned that idle_query_timeout cancels the query.
> Can we please elaborate it further and mention that query still stays open
> (after being cancelled) and consumes a slot in Impala admission control?
> Therefore, though idle_query_timeout helps in saving some resources at Impala
> end, you may still want to configure idle_Session_timeout to same value since
> idle_Session_timeout even closes the query for idle sessions (instead of just
> cancelling) though the requirement for it to trigger is session should stay
> idle.
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