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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2008/01/10 22:18:34 UTC
[jira] Updated: (LUCENE-893) Increase buffer sizes used during
searching
[ https://issues.apache.org/jira/browse/LUCENE-893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Michael McCandless updated LUCENE-893:
--------------------------------------
Component/s: (was: Store)
Search
Description:
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).
was:
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).
> 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: Search
> 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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