Insights with Grafana are not really useable, as soon as there are more than 2 panels in Grafana with the default insights performance level you are getting Azure HTTP 429 Too many requests errors. There is no option in Grafana nor in the Azure Data Explorer Plugin to set a maximum of concurrent queries. Dashboards with just a 2 panels are not really a solution for analytics.
Raising the insights level only increases the maximum concurrent queries to 10, which is only available in the highest level. The next option has 4 concurrent queries. Is there any option to make Grafana even viable with Insights?