Mailing List Archive

Hi,-

 i used this class now before IndexSearher.search api (with collector
as 2nd arg) (Please see the "an interesting case" thread before this
question)


but this time i have a very weird behavior:


i used to have 4000+ hits with default TopScoreDocCollector.create(int
numHits,  ScoreDoc after, int totalHitsThreshold)

internal usage in IndexSearcher.search api which is 1000 and i set after
as null here.


Now when i set totalHitsThreshold and numHits in
TopScoreDocCollector.create to 300

i get 12200+ hits now from totalHits object.


Something is not right here, right?

How can it jump to 3 times when i set totalHitsThreshold as ~ 1/3 of
default value of totalHitsThreshold and numHits?


Best regards



ps.

NOTE: The search(org.apache.lucene.search.Query, int) and
searchAfter(org.apache.lucene.search.ScoreDoc,
org.apache.lucene.search.Query, int) methods are configured to only
count top hits accurately up to 1,000 and may return a lower bound of
the hit count if the hit count is greater than or equal to 1,000. On
queries that match lots of documents, counting the number of hits may
take much longer than computing the top hits so this trade-off allows to
get some minimal information about the hit count without slowing down
search too much. The TopDocs.scoreDocs array is always accurate however.
If this behavior doesn't suit your needs, you should create collectors
manually with either TopScoreDocCollector.create(int, int) or
TopFieldCollector.create(org.apache.lucene.search.Sort, int, int) and
call search(Query, Collector).


at


https://lucene.apache.org/core/8_5_2/core/org/apache/lucene/search/IndexSearcher.html#searchAfter-org.apache.lucene.search.ScoreDoc-org.apache.lucene.search.Query-int-


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