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https://issues.apache.org/jira/browse/LUCENE-1483?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656659#action_12656659
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Mark Miller commented on LUCENE-1483:
-------------------------------------

bq. haven't tried to track it down yet...

I wouldn't. Well the method I am using passes the tests, its not likely viable 
(maybe even on a smaller scale than i would have guessed based on what your 
seeing). But since its close, I figure a benchmark of it against using values 
should tell us a lot about whether it makes sense to keep pushing with ord. Ord 
will no doubt end up a little slower if its to work properly, but comparing 
them now should give us a gauge of using values instead. Thats what we were 
looking for right?

I still have tons I want to look at in this patch (and hopefully some 
ideas/suggestions). I havn't looked at it at all in that context yet though. I 
merely sat down and made the tests pass one by one with little consideration 
for anything else. 

> Change IndexSearcher to use MultiSearcher semantics for multiple subreaders
> ---------------------------------------------------------------------------
>
>                 Key: LUCENE-1483
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1483
>             Project: Lucene - Java
>          Issue Type: Improvement
>    Affects Versions: 2.9
>            Reporter: Mark Miller
>            Priority: Minor
>         Attachments: LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, 
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, 
> LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, LUCENE-1483.patch, 
> LUCENE-1483.patch, LUCENE-1483.patch
>
>
> FieldCache and Filters are forced down to a single segment reader, allowing 
> for individual segment reloading on reopen.

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