Which query do toi use ?
How many data point tout try to display ?
iam using influxdb+telegraf
what did data point mean?
and how to calculate number of data-points ?
i got the same problem with prometheus using snmp protocol to gather metrics from fortigate firewall !
For example every minute for one server telegraf send data to influxdb. On grafana if you want to display 1 hour data, you will have 3600 data points (60 *60)
But forget my question about data point.
Maybe you have hardware limitation. What is your spec ?
Which query do you use ? Do you use agregation ?
You Can use browser debugger ans see if you have network, JSS problem.
How many graph do you have inside your dashboard ?