[jira] [Commented] (LUCENE-6101) Allow the SlowCompositeReaderWrapper and MultiDocValues to accept acceptableOverheadRatio for OrdinalMap

["Robert Muir (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-6101?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14237279#comment-14237279 ] 

Robert Muir commented on LUCENE-6101:
-------------------------------------

This is essentially an implementation detail of merging. I do not think we should offer ram wasting options here, its name slow for a reason.



> Allow the SlowCompositeReaderWrapper and MultiDocValues to accept acceptableOverheadRatio for OrdinalMap
> --------------------------------------------------------------------------------------------------------
>
>                 Key: LUCENE-6101
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6101
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Joel Bernstein
>            Priority: Minor
>         Attachments: lucene-6101.patch
>
>
> There are use cases where it's useful to be able to trade off performance and memory when accessing top level DocValues ordinals.
> This issue adds methods to the SlowCompositeReaderWrapper and MultiDocValues that allow an acceptableOverheadRatio to be passed in and applied to the OrdinalMapping.
> If people are ok with this approach I will add tests and performance benchmarks.



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