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From Erick Erickson <erickerick...@gmail.com>
Subject Re: Result grouping performance
Date Wed, 22 Nov 2017 17:42:22 GMT
Have you enabled docValues (and reindexed from scratch) on the field
you're grouping on?

Best,
Erick

On Wed, Nov 22, 2017 at 5:13 AM, Kempelen, Ákos
<akos.kempelen@wolterskluwer.com> wrote:
> Hello,
>
> I am migrating our codebase from Solr 4.7 to 7.0.1 but the performance of result grouping
seems very poor using the newer Solr.
> For example a simple MatchAllDocsQuery takes 5 sec on Solr4.7, and 21 sec on Solr7.
> I wonder what causes the x4 difference in time? We hoped that newer Solr versions will
provide better performances...
> Using Field collapsing could would be a solution, but it produces different facet counts.
> Thanks,
> Akos
>
>

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