Michael Gibney created SOLR-13108:
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Summary: RelatednessAgg ignores cacheDf, consults filterCache for
every bucket/term
Key: SOLR-13108
URL: https://issues.apache.org/jira/browse/SOLR-13108
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: Facet Module
Affects Versions: 7.4, master (8.0)
Reporter: Michael Gibney
The {{relatedness}} aggregation function in JSON facet API ignores {{cacheDf}}
setting and consults the filterCache for every bucket. This is ok e.g. for
"Query" facet type, where buckets are explicitly enumerated (and thus probably
relatively low cardinality). But for "Terms" facet type, where bucket count is
determined by the corpus, this can be a problem. When used over even modestly
high-cardinality fields, this is very likely to blow out the filterCache.
See also issue with similar consequences: SOLR-9350
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