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https://issues.apache.org/jira/browse/LUCENE-3340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13070697#comment-13070697
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Simon Willnauer commented on LUCENE-3340:
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bq. I think it's ready to commit!
+1 thanks for all the new testcases!
> Buffered deletes are not flushed by RAM or count
> ------------------------------------------------
>
> Key: LUCENE-3340
> URL: https://issues.apache.org/jira/browse/LUCENE-3340
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/index
> Affects Versions: 4.0
> Reporter: Michael McCandless
> Fix For: 4.0
>
> Attachments: LUCENE-3340.patch, LUCENE-3340.patch, LUCENE-3340.patch
>
>
> When a segment is flushed, we will generally NOT flush the deletes, ie we
> simply buffer up the pending delete terms/queries, and the only apply them if
> 1) a segment is going to be merged (so we can remove the del docs in that
> segment), or 2) the buffered deletes' RAM exceeds 1/2 of IW's RAM limit when
> we are flushing a segment, or 3) the buffered deletes count exceeds IWC's
> maxBufferedDeleteTerms.
> But the latter 2 triggers are currently broken on trunk; I suspect (but I'm
> not sure) when we landed DWPT we introduced this bug.
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