Grafana not showing any points when attempting to graph mean of statsd timer


I’m using Grafana to graph the mean time of a statsd timer.

As you can see over a time period like the past 2 days I get the following:

This works because I can just pick out the mean value of this and that is the mean of the time period.

However, for a time period such as 7 days, I experience the following:

Looking in the query inspector I see that when trying to get the values for mean over the past 7 days every value is null.

I’ve tried increasing the datapoints but never get a higher resolution or any mean values returned for a period of 7 days or higher.