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[8.19] Optimize sparse vector stats collection (#128740) #128771

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Merged
merged 1 commit into from
Jun 2, 2025
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[8.19] Optimize sparse vector stats collection (#128740) #128771

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5 changes: 5 additions & 0 deletions docs/changelog/128740.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
pr: 128740
summary: Optimize sparse vector stats collection
area: Stats
type: enhancement
issues: []
19 changes: 9 additions & 10 deletions server/src/main/java/org/elasticsearch/index/engine/Engine.java
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Expand Up @@ -25,7 +25,6 @@
import org.apache.lucene.index.SegmentInfos;
import org.apache.lucene.index.SegmentReader;
import org.apache.lucene.index.Terms;
import org.apache.lucene.index.TermsEnum;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.QueryCache;
import org.apache.lucene.search.QueryCachingPolicy;
Expand Down Expand Up @@ -61,7 +60,6 @@
import org.elasticsearch.index.IndexVersion;
import org.elasticsearch.index.VersionType;
import org.elasticsearch.index.mapper.DocumentParser;
import org.elasticsearch.index.mapper.FieldNamesFieldMapper;
import org.elasticsearch.index.mapper.LuceneDocument;
import org.elasticsearch.index.mapper.Mapper;
import org.elasticsearch.index.mapper.Mapping;
Expand Down Expand Up @@ -337,14 +335,15 @@ protected final SparseVectorStats sparseVectorStats(IndexReader indexReader, Lis

private long getSparseVectorValueCount(final LeafReader atomicReader, List<BytesRef> fields) throws IOException {
long count = 0;
Terms terms = atomicReader.terms(FieldNamesFieldMapper.NAME);
if (terms == null) {
return count;
}
TermsEnum termsEnum = terms.iterator();
for (var fieldName : fields) {
if (termsEnum.seekExact(fieldName)) {
count += termsEnum.docFreq();
for (var fieldNameBR : fields) {
var fieldName = fieldNameBR.utf8ToString();
var fi = atomicReader.getFieldInfos().fieldInfo(fieldName);
if (fi == null) {
continue;
}
Terms terms = atomicReader.terms(fieldName);
if (terms != null) {
count += terms.getDocCount();
}
}
return count;
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