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https://issues.apache.org/jira/browse/LUCENE-8246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16433911#comment-16433911
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ASF subversion and git services commented on LUCENE-8246:
---------------------------------------------------------

Commit e99a19755c75bc71aa53c737b7d4b7b8b15cdbd5 in lucene-solr's branch 
refs/heads/master from [~simonw]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=e99a197 ]

LUCENE-8246: Allow to customize the number of deletes a merge claims

With the introduction of soft deletes no every merge claims all documents
that are marked as deleted in the segment readers. MergePolicies still
need to do accurate accounting in order to select segments for merging
and need to decide if segments are merged. This change allows the
merge policy to customize the number of deletes a merge of a segment
claims.


> Allow to customize the number of deletes a merge claims
> -------------------------------------------------------
>
>                 Key: LUCENE-8246
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8246
>             Project: Lucene - Core
>          Issue Type: Improvement
>    Affects Versions: 7.4, master (8.0)
>            Reporter: Simon Willnauer
>            Priority: Major
>             Fix For: 7.4, master (8.0)
>
>         Attachments: LUCENE-8246.patch
>
>
> With the introduction of soft deletes no every merge claims all documents 
> that are marked as deleted in the segment readers. MergePolicies still need 
> to do accurate accounting in order to select segments for merging and need to 
> decide if segments are merged. This chance allows the merge policy to 
> customize the number of deletes a merge of a segment claims.



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