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https://issues.apache.org/jira/browse/LUCENE-2825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973210#action_12973210
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Jason Rutherglen commented on LUCENE-2825:
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bq. some queries were actually faster with NIOFS on these platforms
I think that's to be expected. MMap should be faster than NIOFS in all cases,
if it's not then the JVM could be to blame (on 64-bit). There's notes at:
LUCENE-753
Doesn't MMap automatically consume a lot more memory?
> 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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