We have elasticsearch 1.5.2 cluster with following distribution:
Node6: Client (For Kibana)
Node3, Node4, Node5 => On same physical node
Node6, Node7 => One same physical node
Our ES is very slow (takes a minute or sometimes gets struck forever) and does not respond well when we retrieve data for last 15 days or more.
We tried adding extra client node (Node 7), but it did not change any response time.
Need suggestions in improving performance. Can adding Client nodes and dedicated master nodes help?