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https://issues.apache.org/jira/browse/LUCENE-1741?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730580#action_12730580
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Michael McCandless commented on LUCENE-1741:
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I'd be more comfortable w/ 256 MB (or, smaller); I think fragmentation could
easily cause 512MB to give the false OOM. I don't think we'll see real perf
costs from buffer switching unless chunk size is very small (eg < 1 MB).
In any event, Uwe can you add to the javadocs describing this false OOM problem
and what to do if you hit it?
> Make MMapDirectory.MAX_BBUF user configureable to support chunking the index
> files in smaller parts
> ---------------------------------------------------------------------------------------------------
>
> Key: LUCENE-1741
> URL: https://issues.apache.org/jira/browse/LUCENE-1741
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.9
> Reporter: Uwe Schindler
> Assignee: Uwe Schindler
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1741.patch, LUCENE-1741.patch
>
>
> This is a followup for java-user thred:
> http://www.lucidimagination.com/search/document/9ba9137bb5d8cb78/oom_with_2_9#9bf3b5b8f3b1fb9b
> It is easy to implement, just add a setter method for this parameter to
> MMapDir.
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