How to fix Grafana dashboard showing no data for Prometheus?

Question

Hello,

I successfully configured logging from my AKS cluster using Log Analytics Workspace, Managed Prometheus and Manage Grafana using AMPLS. I was able to see the data in the Grafana dashboard for couple of days successfully.

Now when i checked the Grafana dashboard it's showing no data however the data source connection is showing 'successfully queried the Prometheus UI.

I can provide more details if needed.

Kindly assist to resolve this issue

Answer 1

Hi azure love

Grafana dashboards are set up to fetch new data periodically. If the dashboard is refreshed too often for the underlying query to load, the panel will be stuck without ever being able to load and display data.

1. Check how frequently the dashboard is configured to refresh data.
   1. In your dashboard, go to Dashboard settings.
   2. In the general settings, lower the Auto refresh rate of the dashboard to be no faster than the time the query takes to load.
2. When a query takes too long to retrieve data. Grafana will automatically time out certain dependency calls that take longer than, for example, 30 seconds. Check that there are no unusual slow-downs on the query's end.

Hope this helps.

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