A legitimate question that only you can answer is "what's the value of faceting on fields with so many unique values?"
Consider the ridiculous case of faceting on <uniqueKey>. There's almost exactly zero value in faceting on it, since all counts will be 1. By analogy, with millions of tag values, will there ever be more than a very small count of for any facet? And will showing those be useful to the user? They may be, and Yago has a use-case where the answer is "yes". Before trying to make Solr perform in this insance, though, I'd review the use-case to see if it makes sense.... Erick On Wed, Jan 22, 2014 at 5:09 PM, Yago Riveiro <yago.rive...@gmail.com> wrote: > You will need to use DocValues if you want to use facets with this amount of > terms and not blow the heap. > > I have facets with ~39M of unique terms, the response time is about 10 ~ 40 > seconds, in my case is not a problem. > > -- > Yago Riveiro > Sent with Sparrow (http://www.sparrowmailapp.com/?sig) > > > On Wednesday, January 22, 2014 at 10:59 PM, Bing Hua wrote: > >> Hi, >> >> I am going to evaluate some Lucene/Solr capabilities on handling faceted >> queries, in particular, with a single facet field that contains large number >> (say up to 1 million) of distinct values. Does anyone have some experience >> on how lucene performs in this scenario? >> >> e.g. >> Doc1 has tags A B C D .... >> Doc2 has tags B C D E .... >> etc etc millions of docs and there can be millions of distinct tag values. >> >> Thanks >> >> >> >> -- >> View this message in context: >> http://lucene.472066.n3.nabble.com/Solr-Lucene-Faceted-Search-Too-Many-Unique-Values-tp4112860.html >> Sent from the Solr - User mailing list archive at Nabble.com >> (http://Nabble.com). >> >> > >
