[ http://issues.apache.org/jira/browse/LUCENE-443?page=all ]
Yonik Seeley resolved LUCENE-443.
---------------------------------
Fix Version/s: 2.1
Resolution: Fixed
Assignee: Yonik Seeley
Thanks! I just committed this.
> ConjunctionScorer tune-up
> -------------------------
>
> Key: LUCENE-443
> URL: http://issues.apache.org/jira/browse/LUCENE-443
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 1.9
> Environment: Linux, Java 1.5, Large Index with 4 million items and
> some heavily nested boolean queries
> Reporter: Abdul Chaudhry
> Assigned To: Yonik Seeley
> Fix For: 2.1
>
> Attachments: Conjunction20060921.patch, ConjunctionScorer.java,
> ConjunctionScorer.java
>
>
> I just recently ran a load test on the latest code from lucene , which is
> using a new BooleanScore and noticed the ConjunctionScorer was crunching
> through objects , especially while sorting as part of the skipTo call. It
> turns a linked list into an array, sorts the array, then converts the array
> back to a linked list for further processing by the scoring engines below.
> 'm not sure if anyone else is experiencing this as I have a very large index
> (> 4 million items) and I am issuing some heavily nested queries
> Anyway, I decide to change the link list into an array and use a first and
> last marker to "simulate" a linked list.
> This scaled much better during my load test as the java gargbage collector
> was less - umm - virulent
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