Graph panels using “Mixed” data sources do not respect Prometheus “Scrape Interval”. We’re using Prometheus and collecting on a 30 second scrape interval. If I create a graph of Prometheus data it comes out nice and smooth. However, if I switch the data source to “Mixed” and then generate the same graph from the same Prometheus server I get an ugly stair-step graph. This is because the graph resolution is now displaying values for every 1 second, but the data is only coming in once every 30 seconds. The scrape interval of Prometheus is not being respected in Mixed data source graphs.
I’m building graphs that contain values from multiple Prometheus servers. The data is all Prometheus, but as soon as I use “mixed” mode it doesn’t look so nice. Am I missing something, or is this something that needs correcting in Grafana?