On Thu, Oct 5, 2017 at 10:07 AM, Erick Erickson <erickerick...@gmail.com> wrote: > The other thing I'd point out is that if your hit ratio is low, you > might as well disable it entirely.
I'd normally recommend against turning it off entirely, except in *very* custom cases. Even if the user doesn't reuse filter queries, Solr itself can internally in many different ways. One way is 2-phase distributed search for example. Another is big terms in UIF faceting. Some of these things were designed with the presence of a filter cache in mind. -Yonik
