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ASF subversion and git services commented on SOLR-7730: ------------------------------------------------------- Commit 1720241 from m...@apache.org in branch 'dev/branches/branch_5x' [ https://svn.apache.org/r1720241 ] SOLR-7730: mention in 5.4.0's Optimizations > speed-up faceting on doc values fields > -------------------------------------- > > Key: SOLR-7730 > URL: https://issues.apache.org/jira/browse/SOLR-7730 > Project: Solr > Issue Type: Improvement > Components: faceting > Affects Versions: 5.2.1 > Reporter: Mikhail Khludnev > Assignee: Mikhail Khludnev > Labels: patch > Fix For: 5.4 > > Attachments: LUCENE-7730.patch, LUCENE-7730.patch, > SOLR-7730-changes.patch, SOLR-7730.patch > > > every time we count facets on DocValues fields in Solr on many segments index > we see the unnecessary hotspot: > {code} > .... > at > org.apache.lucene.index.MultiFields.getMergedFieldInfos(MultiFields.java:248) > at > org.apache.lucene.index.SlowCompositeReaderWrapper.getFieldInfos(SlowCompositeReaderWrapper.java:239) > at > org.apache.lucene.index.SlowCompositeReaderWrapper.getSortedSetDocValues(SlowCompositeReaderWrapper.java:176) > at > org.apache.solr.request.DocValuesFacets.getCounts(DocValuesFacets.java:72) > at > org.apache.solr.request.SimpleFacets.getTermCounts(SimpleFacets.java:460) .... > {code} > the reason is SlowCompositeReaderWrapper.getSortedSetDocValues() Line 136 and > SlowCompositeReaderWrapper.getSortedDocValues() Line 174 > before return composite doc values, SCWR merges segment field infos, which is > expensive, but after fieldinfo is merged, it checks *only* docvalue type in > it. This dv type check can be done much easier in per segment basis. > This patch gets some performance gain for those who count DV facets in Solr. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org