Hi John, first of all, I may state the obvious, but have you tried docValues ?
Apart from that a friend of mine ( Diego Ceccarelli) was discussing a probabilistic implementation similar to the hyperloglog[1] to approximate facets counting. I didn't have time to take a look in details / implement anything yet. But it is on our To Do list :) He may add some info here. Cheers [1] https://blog.yld.io/2017/04/19/hyperloglog-a-probabilistic-data-structure/ ----- --------------- Alessandro Benedetti Search Consultant, R&D Software Engineer, Director Sease Ltd. - www.sease.io -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
