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https://issues.apache.org/jira/browse/LUCENE-2825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12975212#action_12975212
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Earwin Burrfoot commented on LUCENE-2825:
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{quote}
bq. CPU cache / TLB effects? Using more address space isn't completely free.
In the case of Solaris I think there is much less of a chance of TLB effects?
For example on Solaris java automatically uses large pages (unlike Linux,
Windows etc).
{quote}
For, like, 13Gb of memory-mapped index, I've seen no noticeable difference
between having large pages on and off under Linux. That's some anecdotal
evidence, as I'ven't done any extensive research, but still.
> 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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