Hey folks,
I’m new to Grafana and am trying to understand how time is used when generating irate/rate charts. We are using Prometheus as our primary datasource on a Kubernetes cluster using the stable/prometheus chart.
When I imported a dashboard from the marketplace, I noticed it had rate(query_field{app="selector"}[15s]). However, this resulted in “no data” on the graphs. If I changed 15s to 2m I started to get results.
From what I can see, Prometheus’ scrape defaults to 60 seconds. However, when I look at a graph with 2m set, I see data points every 15 seconds. As you can probably tell, I’m completely confused on what value to set for these queries.
Is there a guide somewhere, or someone have a minute to explain to me how to determine what this value should be?
Cheers,
Andrew