Alessandro Benedetti created SOLR-9176:
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Summary: Legacy Faceting Term Enum Method Regression
Key: SOLR-9176
URL: https://issues.apache.org/jira/browse/SOLR-9176
Project: Solr
Issue Type: Bug
Components: faceting
Affects Versions: 6.0.1, 6.0, 5.5.1, 5.5, 5.4.1, 5.4, 5.3.2, 5.3.1, 5.3,
5.2.1, 5.2
Reporter: Alessandro Benedetti
Starting from this commit :
LUCENE-5666: get solr started
git-svn-id:
https://svn.apache.org/repos/asf/lucene/dev/branches/lucene5666@1594254
13f79535-47bb-0310-9956-ffa450edef68
It is not possible to use Term Enum as a faceting method, for numeric and
single valued fields.
We personally verified that there are use cases when this is bringing a quite
big performance regression ( even with DocValues enabled) .
In the mailing list from time to time people complain about a regression
happening with the term enum method, but actually it is more likely to be the
automatic forcing of FCS.
Forcing FCS in co-op with the famous regression that happened in SOLR-8096
could be confused as a term Enum regression.
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