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https://issues.apache.org/jira/browse/LUCENE-2047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12775121#action_12775121
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Michael McCandless commented on LUCENE-2047:
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I think simply default to true.
Yes, please cons up a patch!
> IndexWriter should immediately resolve deleted docs to docID in
> near-real-time mode
> -----------------------------------------------------------------------------------
>
> Key: LUCENE-2047
> URL: https://issues.apache.org/jira/browse/LUCENE-2047
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Priority: Minor
> Fix For: 3.0
>
>
> Spinoff from LUCENE-1526.
> When deleteDocuments(Term) is called, we currently always buffer the
> Term and only later, when it's time to flush deletes, resolve to
> docIDs. This is necessary because we don't in general hold
> SegmentReaders open.
> But, when IndexWriter is in NRT mode, we pool the readers, and so
> deleting in the foreground is possible.
> It's also beneficial, in that in can reduce the turnaround time when
> reopening a new NRT reader by taking this resolution off the reopen
> path. And if multiple threads are used to do the deletion, then we
> gain concurrency, vs reopen which is not concurrent when flushing the
> deletes.
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