IndexWriter should prune 100% deleted segs even in the NRT case
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Key: LUCENE-2918
URL: https://issues.apache.org/jira/browse/LUCENE-2918
Project: Lucene - Java
Issue Type: Improvement
Components: Index
Reporter: Michael McCandless
Assignee: Michael McCandless
Priority: Minor
Fix For: 3.2, 4.0
We now prune 100% deleted segs on commit from IW or IR (LUCENE-2010),
but this isn't quite aggressive enough, because in the NRT case you
rarely call commit.
Instead, the moment we delete the last doc of a segment, it should be
pruned from the in-memory segmentInfos. This way, if you open an NRT
reader, or a merge kicks off, or commit is called, the 100% deleted
segment is already gone.
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