topic Re: [Dynatrace SaaS] Why is failure rate higher than 100%? in Alerting

[Dynatrace SaaS] Why is failure rate higher than 100%?

jalecrim — Mon, 04 Jan 2021 16:53:54 GMT

Hi!

We discovered today that our failure rate anomaly detection based on a custom metric was frequently higher than 100%. Can someone explain me why?

Thank you...

Re: [Dynatrace SaaS] Why is failure rate higher than 100%?

ChadTurner — Mon, 04 Jan 2021 19:14:40 GMT

It appears that you have the Unit set to Percent, and the aggregations are set to auto, sum. I suspect that the system is looking at your percentages then adding them up to give you a value over 100%

Re: [Dynatrace SaaS] Why is failure rate higher than 100%?

jalecrim — Tue, 05 Jan 2021 09:55:26 GMT

I've tested with Failure rate as seen by caller, and it seems much more adequate:

The sampling is not the best, there are few accesses, but values seem far better now.

Thank you!