I'm working with a 3 nodes cluster in a production environment. I've upgraded my cluster from 6.2.4 version to 6.7.1. I've noticed that loading data in the dashboard and the discover loading in the same time range has become slower than before, sometimes request goes out of time, now I've changed the request.timeout i Kibana config to 60s to visualize the data, but I want to understand the reason . The only thing that I have changed in my cluster config is that now I have 3 data nodes instead of 2. Is it a normal issue for index created in a previous version? Is there any config I have to look after to tune my loading?
Thank you very much.