[jira] [Updated] (SOLR-8988) Improve facet.method=fcs performance in SolrCloud

["Keith Laban (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-8988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Keith Laban updated SOLR-8988:
------------------------------
    Attachment: SOLR-8988.patch

> Improve facet.method=fcs performance in SolrCloud
> -------------------------------------------------
>
>                 Key: SOLR-8988
>                 URL: https://issues.apache.org/jira/browse/SOLR-8988
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Keith Laban
>         Attachments: SOLR-8988.patch
>
>
> This relates to SOLR-8559 -- which improves the algorithm used by fcs faceting when {{facet.mincount=1}}
> This patch allows {{facet.mincount}} to be sent as 1 for distributed queries. As far as I can tell there is no reason to set {{facet.mincount=0}} for refinement purposes . After trying to make sense of all the refinement logic, I cant see how the difference between _no value_ and _value=0_ would have a negative effect.
> *Test perf:*
> - ~15million unique terms
> - query matches ~3million documents
> *Params:*
> {code}
> facet.mincount=1
> facet.limit=500
> facet.method=fcs
> facet.sort=count
> {code}
> *Average Time Per Request:*
> - Before patch:  ~20seconds
> - After patch: <1 second
> *Note*: all tests pass and in my test, the output was identical before and after patch.



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