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https://issues.apache.org/jira/browse/LUCENE-3198?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-3198.
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Resolution: Fixed
OK I cutover just Linux, 64 bit, when unmap is available.
We can open new issues for other platforms when we have some data that MMap is
better...
> Change default Directory impl on 64bit linux to MMap
> ----------------------------------------------------
>
> Key: LUCENE-3198
> URL: https://issues.apache.org/jira/browse/LUCENE-3198
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/store
> Reporter: Michael McCandless
> Fix For: 3.3, 4.0
>
>
> Consistently in my NRT testing on Fedora 13 Linux, 64 bit JVM (Oracle
> 1.6.0_21) I see MMapDir getting better search and merge performance when
> compared to NIOFSDir.
> I think we should fix the default.
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