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From Maria Muslea <>
Subject Re: prefix facet performance
Date Fri, 21 Apr 2017 13:19:16 GMT
Actually using facet.method=enum made a HUGE difference even in my case
where I have many unique values. I am happy with the query response time

Is there a way in SOLR to count the unique values for a field? If not, I
could run the reindexing and count the unique values while I add them to
give you a more accurate count of how many I have (there is a good chance
that I have more than 500K).


On Fri, Apr 21, 2017 at 1:16 AM, alessandro.benedetti <>

> Hi Maria,
> If you have 100-500.000 unique values for the field you are interested in,
> and the cardinality of your search results is actually quite small in
> comparison, I am not that sure term enum will help you that much ...
> To simplify, with the term enum approach, you iterate over each unique
> value, if it matches the prefix and then you count the intersection of the
> result set with the posting list for that term.
> In your case, your result set is likely to be much smaller than the number
> of unique values.
> I would assume you are using the fc approach, which in my opinion was not a
> bad idea.
> Let's start from the algorithm you are using and the schema config for your
> field,
> Cheers
> -----
> ---------------
> Alessandro Benedetti
> Search Consultant, R&D Software Engineer, Director
> Sease Ltd. -
> --
> View this message in context: http://lucene.472066.n3.
> Sent from the Solr - User mailing list archive at

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