We are running on not so good hardware (business choice.... why would monitoring be important?) , so am placed in a position where I want to increase the time out for Kibana. I am running 4.4.2 and for some reason it seems to ignore the timeout value when I increase it.
One of the other annoying things, is when a query does time out, Kibana then throws the status page saying that a query took more than 30 seconds. Don't really care about that, because that query has been and gone, but then you can't actually do anything useful with Kibana for a while afterwards, as it wants you to know that a timeout has occurred.