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https://issues.apache.org/jira/browse/IMPALA-12548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17784590#comment-17784590
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Riza Suminto commented on IMPALA-12548:
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After some discussion, it is deemed that current behavior is a bug. Repurpose
this Jira for bugfixing.
> Clarify the meaning of AGG_MEM_CORRELATION_FACTOR
> -------------------------------------------------
>
> Key: IMPALA-12548
> URL: https://issues.apache.org/jira/browse/IMPALA-12548
> Project: IMPALA
> Issue Type: Documentation
> Reporter: Riza Suminto
> Priority: Minor
>
> AGG_MEM_CORRELATION_FACTOR has valid value between 0.0 to 1.0. This query
> option name can be misinterpreted as high value means highly correlated
> columns, but it is actually the opposite in the code implementation. 1.0 is
> interpreted as no correlation at all in the code, while <1.0 means somewhat
> correlated. Documentation should be clarified about this.
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