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https://issues.apache.org/jira/browse/LUCENE-7589?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15741566#comment-15741566
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Michael McCandless commented on LUCENE-7589:
--------------------------------------------

bq. However if you add a new field that stores the average number of miles per 
hour as a long doc values field, then it highlights the quality issues of this 
dataset and disk usage for this field goes from 40 to 15.7 bits per value 
(-60%) with the patch.

Ahhh, I see!  The taxis that go faster than the speed of light are not apparent 
now since we don't store that field directly... makes sense.

> Prevent outliers from raising the number of bits of everyone with numeric doc 
> values
> ------------------------------------------------------------------------------------
>
>                 Key: LUCENE-7589
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7589
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Adrien Grand
>            Assignee: Adrien Grand
>            Priority: Minor
>         Attachments: LUCENE-7589.patch
>
>
> Today we encode entire segments with a single number of bits per value. It 
> was done this way because it was faster, but it also means a single outlier 
> can significantly increase the space requirements. I think we should have 
> protection against that.



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