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https://issues.apache.org/jira/browse/LUCENE-2825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973264#action_12973264
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Robert Muir commented on LUCENE-2825:
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bq. There could be a number of things that could make this very OS dependent:
I agree, we should test any OS before changing any defaults.
In the Solaris case its clear that mmap is better for our purposes though (as
to exactly why, no idea)
> FSDirectory.open should return MMap on 64-bit Solaris
> -----------------------------------------------------
>
> Key: LUCENE-2825
> URL: https://issues.apache.org/jira/browse/LUCENE-2825
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Store
> Reporter: Robert Muir
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2825.patch
>
>
> MMap is ~ 30% faster than NIOFS on this platform.
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