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From Andy <angelf...@yahoo.com>
Subject Re: How many facet values are too many?
Date Fri, 19 Mar 2010 19:36:46 GMT
Are you referring to the facet.limit parameter?

If it is set to N, does that mean Solr only has to process N values, or that Solr will still
process all the values but only return the top N ones?


--- On Fri, 3/19/10, Smiley, David W. <dsmiley@mitre.org> wrote:

From: Smiley, David W. <dsmiley@mitre.org>
Subject: Re: How many facet values are too many?
To: "solr-user@lucene.apache.org" <solr-user@lucene.apache.org>
Date: Friday, March 19, 2010, 9:07 AM

On Mar 18, 2010, at 10:53 PM, Andy wrote:

> My understanding is that too many facet values will decrease performance
> 
> How many is too many? Are there any rules of thumb for this?
> 
> 2 related questions:
> 
> - I expect a facet field to have many values (values are user generated), any thing I
can do to minimize the performance impact?
> 
> - Any way to tell Solr to just at the top N values, kinda like the LIMIT clause in SQL?
> 
> Thanks

Not sure on the "how many is too many" question but I wouldn't be concerned; Solr does faceting
very well with highly optimized code.
The latter question -- absolutely. Standard stuff.  Check out the wiki or buy my book.

~ David Smiley
Author: http://www.packtpub.com/solr-1-4-enterprise-search-server/







      
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