[
https://issues.apache.org/jira/browse/SOLR-7730?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mikhail Khludnev updated SOLR-7730:
-----------------------------------
Fix Version/s: (was: 5.3)
5.3.1
> 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: 5.3.1
>
> Attachments: LUCENE-7730.patch, LUCENE-7730.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: [email protected]
For additional commands, e-mail: [email protected]
