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https://issues.apache.org/jira/browse/SOLR-7876?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14721352#comment-14721352
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Yonik Seeley commented on SOLR-7876:
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Hmmm, that is interesting, and it raises red flags for me as I'm not sure why
this patch would affect caching. ExitableDirectoryReader and friends delegate
cache core keys to the underlying readers. Any theories / clues?
> Support disabling ExitableDirectory wrapper when not needed
> -----------------------------------------------------------
>
> Key: SOLR-7876
> URL: https://issues.apache.org/jira/browse/SOLR-7876
> Project: Solr
> Issue Type: Bug
> Affects Versions: 5.0, 5.1, 5.2, 5.2.1
> Reporter: Tomás Fernández Löbbe
> Fix For: Trunk, 5.4
>
> Attachments: SOLR-7876.patch
>
>
> ExitableDirectoryReader can cause some overhead in Solr for some use cases,
> even when not really used. There should be a way of not using it when not
> needed.
> See http://search-lucene.com/m/l6pAi1HLrodLhNUd
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