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Posted to dev@lucene.apache.org by "ASF subversion and git services (JIRA)" <ji...@apache.org> on 2016/10/19 20:38:59 UTC
[jira] [Commented] (SOLR-7580) Number of ScoreDoc instances equals
rows parameter, not actual number of matches
[ https://issues.apache.org/jira/browse/SOLR-7580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15589791#comment-15589791 ]
ASF subversion and git services commented on SOLR-7580:
-------------------------------------------------------
Commit 8ae3304c8631e1ba9a14aa0fc576e13b9198dfe5 in lucene-solr's branch refs/heads/master from [~dsmiley]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=8ae3304 ]
SOLR-7580: Move defaults in bin/solr.in.sh into bin/solr (incl. Windows)
> Number of ScoreDoc instances equals rows parameter, not actual number of matches
> --------------------------------------------------------------------------------
>
> Key: SOLR-7580
> URL: https://issues.apache.org/jira/browse/SOLR-7580
> Project: Solr
> Issue Type: Improvement
> Affects Versions: 5.1
> Reporter: Markus Jelsma
> Fix For: 5.5, 6.0
>
>
> We have several batch jobs that use StreamingResponseCallback to collect all records matching a specific query. For each record, we execute a new query and need all results without paging through them. Because we do not know the amount of matches to expect, we do setRows(Integer.MAX_VALUE);. According to the VisualVM samples, this results in a huge amount of ScoreDoc instances, making the query unreasonably slow.
> The current work-around we use is to execute the same query with setRows(0), get numResults, and then reissue the query with setRows(numResults). This is fast, almost as fast as one would expect.
> This is, however, a very dirty work-around. I am unsure whether this is a Solr or Lucene issue, SolrIndexSearcher is a beast to debug ;)
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