Optimizing Solr for Sorting

Question

I\'m using Solr for a realtime search index. My dataset is about 60M large documents. Instead of sorting by relevance, I need to sort by time. Currently I\'m using the sort flag

Answer 1

I found the answer.

If you want to sort by time, and not relevance, use fq= instead of q= for all of your filters. This way, Solr doesn't waste time figuring out the weighted value of the documents matching q=. It turns out that Solr was spending too much time weighting, not sorting.

Additionally, you can speed sorting up by pre-warming your sort fields in the newSearcher and firstSearcher event listeners in solrconfig.xml. This will ensure that sorts are done via cache.