I just received an alert on a metric going below a threshold. A few minutes later I got an [OK] email and the value was different. Please see the images for clarification but at 12:00 you can see in the alerting email the value is below the threshold but then later the value changes and I receive an [OK] email. The final photo shows the non-downsampled data and the data clearly has a massive spike.
I was under the impression that the 1h downsampled data wasn’t constantly updating, it was the average of the previous hour but it appears that is not the case?