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Posted to issues@lucene.apache.org by "Adrien Grand (Jira)" <ji...@apache.org> on 2022/05/11 07:01:00 UTC

[jira] [Resolved] (LUCENE-10555) avoid repeated NumericLeafComparator setScorer calls

     [ https://issues.apache.org/jira/browse/LUCENE-10555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Adrien Grand resolved LUCENE-10555.
-----------------------------------
    Fix Version/s: 9.2
       Resolution: Fixed

> avoid repeated NumericLeafComparator setScorer calls
> ----------------------------------------------------
>
>                 Key: LUCENE-10555
>                 URL: https://issues.apache.org/jira/browse/LUCENE-10555
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: jianping weng
>            Priority: Major
>             Fix For: 9.2
>
>          Time Spent: 1h 40m
>  Remaining Estimate: 0h
>
> ElasticSearch use CancellableBulkScorer to fast cancel long time query execution by dividing one segment docs to many small split docs. For every split docs, collector.setScorer(scorer) is called, then  NumericLeafComparator#setScorer is called. As a result, for one segment, NumericLeafComparator#setScorer is called many times. 
> Every time NumericLeafComparator#setScorer is called, the NumericLeafComparator#iteratorCost is reset to the Scorer.cost and increase many unnecessary  pointValues#intersect calls to get  competitive docs.



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