I'm currently using filters only and tuning my queries.
For large (in terms of # of docs, several millions) index, I observe the query latency gets higher when I set # of shards to one from the default of 5 on single node cluster. Is it just because of the parallelism involved? Or is there something else?
Thanks in advance.
I already tried to see if # of segments in a shard makes that much difference. But seems it doesn't. So guess more shards don't simply decrease latency by partitioning large set of data.