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https://issues.apache.org/jira/browse/LUCENE-1035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Shai Erera closed LUCENE-1035.
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Resolution: Not A Problem
It seems there was never consensus to carry on with this issue, mostly because
the gains are not too clear (e.g., if you have AND queries, this directory may
not be such a big win, and I think AND is used a lot more today by default?) or
if your index is bigger than the FS cache, which I think it also something
that's becoming more and more relevant these days -- we see lot more biggish
indexes than small ones.
Since there was no activity in the past 2.5 years, I'm closing it. If at some
point someone will think that this is worth reopening, please do.
> Optional Buffer Pool to Improve Search Performance
> --------------------------------------------------
>
> Key: LUCENE-1035
> URL: https://issues.apache.org/jira/browse/LUCENE-1035
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Store
> Reporter: Ning Li
> Attachments: LUCENE-1035.contrib.patch, LUCENE-1035.patch
>
>
> Index in RAMDirectory provides better performance over that in FSDirectory.
> But many indexes cannot fit in memory or applications cannot afford to
> spend that much memory on index. On the other hand, because of locality,
> a reasonably sized buffer pool may provide good improvement over FSDirectory.
> This issue aims at providing such an optional buffer pool layer. In cases
> where it fits, i.e. a reasonable hit ratio can be achieved, it should provide
> a good improvement over FSDirectory.
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