lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Mike Klaas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1035) Optional Buffer Pool to Improve Search Performance
Date Fri, 26 Oct 2007 22:45:50 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12538126
] 

Mike Klaas commented on LUCENE-1035:
------------------------------------

> Query set with average 590K results, retrieving docids for the first 5K

That seems like quite a few docs to retrieve--any particular reason why?  (It would be good
to know if the speedup is occuring in the query phase or doc retrieval).  This would also
explain why VInt decoding is not the bottleneck (it wouldn't be much-used for retrieving stored
fields).

I echo Hoss' comment--proximity searching is important even if it isn't used much _directly_
by users.

> 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.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.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org


Mime
View raw message