GroupingSearch return 0 when setAllGroups(true)

2012-11-28 Thread d...@neusoft.com 
Is this a bug？

when using group function, I set "groupingSearch.setAllGroups(true);", but it 
return groupCount = 0

I saw the source , I found that :   

if (allGroupHeads) {
collectors.add(allGroupsCollector);
}
if (allGroupHeads) {
collectors.add(allGroupHeadsCollector);
}

It seemed that it should use allGroup flag, not allGroupHeads.

I am a newbie to Lucene, so I want to ask whether it is right?
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Re: Performance StringCoding.decode

2014-08-05 Thread d...@neusoft.com 
how to monitor? use jprofile?




 
From: Sascha Janz
Date: 2014-08-05 22:36
To: [email protected]
Subject: Performance StringCoding.decode
hi,
 
i want to speed up our search performance. so i run test and monitor them with 
java mission control.
 
the analysis showed that one hotspot is 
 
 
sun.nio.cs.UTF_8$Decoder.decode(byte[], int, int, char[])
- java.lang.StringCoding.decode(Charset, byte[], int, int)
   - java.lang.String.(byte[], int, int, Charset) 
 
-org.apache.lucene.codecs.compressing.CompressingStoredFieldsReader.readField(DataInput,
 
  StoredFieldVisitor, FieldInfo, int)
  
-org.apache.lucene.codecs.compressing.CompressingStoredFieldsReader.visitDocument(int,
   StoredFieldVisitor)
   -org.apache.lucene.index.SegmentReader.document(int, StoredFieldVisitor)
-org.apache.lucene.index.IndexReader.document(int, Set)
 
we use jdk 1.7.55 and lucene 4.9.0.
 
is there a chance to speed this up? or do some changes in lucene 
IndexWriterConfig, e.g. use an other codec?
 
we use the default values of IndexWriterConfig
 
 
regards
sascha
 
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