Currently, I use 2 servers(2 shards+1 replica) to query 0.46 billion
documents. The average query response time is 1.5s.
I wish I can simply add a new server into the cluster to improve the
query performance. (still 2 shards + 1 replica)
But after adding a new server into the cluster, I found the query
performance didn't improve much. The average query response time still is
Did I miss anything??
In addition, I'm wondering is there any difference of querying only one
server or query 3 servers roundly?