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https://issues.apache.org/jira/browse/SOLR-4763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13803997#comment-13803997
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Daniel Bryant commented on SOLR-4763:
-------------------------------------
Hi all,
For anyone following this issue it is worth looking at an upcoming related fix
in Solr 4.6 https://issues.apache.org/jira/browse/SOLR-5027
We're just testing if this meets our requirements now.
Thanks to Charlie Hull from Flax for pointing us towards this!
Daniel
> Performance issue when using group.facet=true
> ---------------------------------------------
>
> Key: SOLR-4763
> URL: https://issues.apache.org/jira/browse/SOLR-4763
> Project: Solr
> Issue Type: Bug
> Affects Versions: 4.2
> Reporter: Alexander Koval
>
> I do not know whether this is bug or not. But calculating facets with
> {{group.facet=true}} is too slow.
> I have query that:
> {code}
> "matches": 730597,
> "ngroups": 24024,
> {code}
> 1. All queries with {{group.facet=true}}:
> {code}
> "QTime": 5171
> "facet": {
> "time": 4716
> {code}
> 2. Without {{group.facet}}:
> * First query:
> {code}
> "QTime": 3284
> "facet": {
> "time": 3104
> {code}
> * Next queries:
> {code}
> "QTime": 230,
> "facet": {
> "time": 76
> {code}
> So I think with {{group.facet=true}} Solr doesn't use cache to calculate
> facets.
> Is it possible to improve performance of facets when {{group.facet=true}}?
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