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https://issues.apache.org/jira/browse/SOLR-15666?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423362#comment-17423362
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Mark Robert Miller commented on SOLR-15666:
-------------------------------------------

This issue collaborates with SOLR-15510 and SOLR-15671, but goes after things 
outside BitSets. The above data includes the work from this issue as well as 
SparseBitUsage though.

> Heavily reduce faceting ram usage for many cases.
> -------------------------------------------------
>
>                 Key: SOLR-15666
>                 URL: https://issues.apache.org/jira/browse/SOLR-15666
>             Project: Solr
>          Issue Type: Sub-task
>            Reporter: Mark Robert Miller
>            Assignee: Mark Robert Miller
>            Priority: Major
>
> Spinning this out of various efforts from the parallel segments search 
> branches.
> Would require a bit more tuning and a much more extensive benchmark 
> verification effort.
> This has performance impact as well given gc costs of faceting.



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