IndexWriter should let you optionally enable reader pooling [LUCENE-2297]

[asfimport]

For apps using a large index and frequently need to commit and resolve deletes, the cost of opening the SegmentReaders on demand for every commit can be prohibitive.

We an already pool readers (NRT does so), but, we only turn it on if NRT readers are in use.

We should allow separate control.

We should do this after #3370.

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Migrated from LUCENE-2297 by Michael McCandless (@mikemccand), resolved Mar 22 2010
Attachments: LUCENE-2297.patch
Linked issues:

• Create IndexWriterConfiguration and store all of IW configuration there [LUCENE-2294] #3370

[asfimport]

Michael McCandless (@mikemccand) (migrated from JIRA)

Adds IWC.set/getReaderPooling.

[asfimport]

Michael McCandless (@mikemccand) (migrated from JIRA)

Fixed on newtrunk.