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From Mikhail Khludnev <m...@apache.org>
Subject Re: Result grouping performance
Date Thu, 23 Nov 2017 07:37:39 GMT
Akos,
Can you provide your request params? Do you just group and/or count grouped
facets?
Can you clarify how field collapsing is different from grouping, just make
it unambiguous?


On Wed, Nov 22, 2017 at 4:13 PM, 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
>
>
>


-- 
Sincerely yours
Mikhail Khludnev

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