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https://issues.apache.org/jira/browse/LUCENE-2825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973212#action_12973212
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Robert Muir commented on LUCENE-2825:
-------------------------------------

bq. Doesn't MMap automatically consume a lot more memory?

No.


> 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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