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From "Keith Laban (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-8988) Improve facet.method=fcs performance in SolrCloud
Date Thu, 26 May 2016 16:58:12 GMT

    [ https://issues.apache.org/jira/browse/SOLR-8988?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15302430#comment-15302430
] 

Keith Laban commented on SOLR-8988:
-----------------------------------

Thats right. This affects all queries where {{isDistrib}} is true for any reason.

> Improve facet.method=fcs performance in SolrCloud
> -------------------------------------------------
>
>                 Key: SOLR-8988
>                 URL: https://issues.apache.org/jira/browse/SOLR-8988
>             Project: Solr
>          Issue Type: Improvement
>    Affects Versions: 5.5, 6.0
>            Reporter: Keith Laban
>            Assignee: Dennis Gove
>             Fix For: 6.1
>
>         Attachments: SOLR-8988.patch, SOLR-8988.patch, SOLR-8988.patch, SOLR-8988.patch,
Screen Shot 2016-04-25 at 2.54.47 PM.png, Screen Shot 2016-04-25 at 2.55.00 PM.png
>
>
> 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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