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https://issues.apache.org/jira/browse/LUCENE-1329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12624634#action_12624634
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Eks Dev commented on LUCENE-1329:
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Mike, did someone measure what this brings?
This practically reduces need to have many IndexReader-s in MT setup when Index
is used in read only case.
> Remove synchronization in SegmentReader.isDeleted
> -------------------------------------------------
>
> Key: LUCENE-1329
> URL: https://issues.apache.org/jira/browse/LUCENE-1329
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Affects Versions: 2.3.1
> Reporter: Jason Rutherglen
> Assignee: Michael McCandless
> Priority: Trivial
> Fix For: 2.4
>
> Attachments: LUCENE-1329.patch, LUCENE-1329.patch, lucene-1329.patch
>
>
> Removes SegmentReader.isDeleted synchronization by using a volatile
> deletedDocs variable on Java 1.5 platforms. On Java 1.4 platforms
> synchronization is limited to obtaining the deletedDocs reference.
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