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https://issues.apache.org/jira/browse/LUCENE-1265?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12590082#action_12590082
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Karl Wettin commented on LUCENE-1265:
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I'll be looking in to this any year now.
> Identify bottleneck associated with not pooling searchers
> ---------------------------------------------------------
>
> Key: LUCENE-1265
> URL: https://issues.apache.org/jira/browse/LUCENE-1265
> Project: Lucene - Java
> Issue Type: Task
> Components: Search
> Reporter: Karl Wettin
>
> There have been multiple reports suggesting synchronization problems due to
> great search performace boost while pooling searchers under heavy load.
> I think this should be confirmed. Then identified and fixed, alternatively
> add such a pool to the code base.
> http://www.nabble.com/Multiple-searchers-%28Was%3A-CachingWrapperFilter%3A-why-cache-per-IndexReader-%29-td14916124.html#a14997611
> http://www.nabble.com/Solid-State-Drives-vs.-RAMDirectory-td16025864.html
> http://wiki.apache.org/lucene-java/ImproveSearchingSpeed
> Use one instance of IndexSearcher.
> Share a single IndexSearcher across queries and across threads in your
> application.
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