Sofiya Strochyk <s...@interlogic.com.ua> wrote: > 5. Yes, docValues are enabled for the fields we sort on > (except score which is an internal field); [...]
I am currently working on https://issues.apache.org/jira/browse/LUCENE-8374 which speeds up DocValues-operations for indexes with many documents. What "many" means is hard to say, but as can be seen in the JIRA, Tim Underwood sees a nice speed up for faceting with his 80M doc index. Hopefully it can also benefit your 40M doc (per shard) index with sorting on (I infer) multiple DocValued fields. I'd be happy to assist, should you need help with the patch. - Toke Eskildsen
