Fwd: [jira] Created: (LUCENE-893) Increase buffer sizes used during searching

[Michael McCandless <lu...@mikemccandless.com>]

I'm not going to have time to look at this one for a while (need to
bring closure to LUCENE-843) so if anyone has the interest &
time & a good search benchmark set up already, feel free to take it.

Thanks.

Mike

On Fri, 25 May 2007 12:44:16 -0700 (PDT), "Michael McCandless (JIRA)" <ji...@apache.org> said:
> Increase buffer sizes used during searching
> -------------------------------------------
> 
>                  Key: LUCENE-893
>                  URL: https://issues.apache.org/jira/browse/LUCENE-893
>              Project: Lucene - Java
>           Issue Type: Improvement
>           Components: Store
>     Affects Versions: 2.1
>             Reporter: Michael McCandless
> 
> 
> 
> Spinoff of LUCENE-888.
> 
> In LUCENE-888 we increased buffer sizes that impact indexing and found
> substantial (10-18%) overall performance gains.
> 
> It's very likely that we can also gain some performance for searching
> by increasing the read buffers in BufferedIndexInput used by
> searching.
> 
> We need to test performance impact to verify and then pick a good
> overall default buffer size, also being careful not to add too much
> overall HEAP RAM usage because a potentially very large number of
> BufferedIndexInput instances are created during searching
> (# segments X # index files per segment).
> 
> 
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