Understanding the High CPU Throttling Alert

fcalega — Fri, 26 May 2023 10:54:01 GMT

Hello Community.

I need to understand how this alert is formed.
I understand that the calculation is the Sum of workload CPU throttled / Sum of workload CPU usage * 100.

This calculation gives the percentage of throttling that is given from the throttled metric over the CPU usage metric.
When we turn on this alert, even with a threshold of 100%, we have a lot of alerts going off.
In analyzing the microservices, we see that these alerts are triggered by specific spikes in CPU throttling/usage.

The questions that arise for me are as follows:

1 - How to correctly configure the thresholds to actually alert microservices with high CPU throttling/usage that is sustained over time, and not triggered by specific peaks.
2 - What recommendations do you give or what documentation is available to further understand how Dynatrace measures and alarms throttling?

Thank you very much.

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Re: Understanding the High CPU Throttling Alert

ChadTurner — Thu, 15 Jun 2023 15:58:46 GMT

you can create a custom threshold that allows you to define the height of the usage for alerting, and you can also create a custom metric event that allows you to define the timeline of alerting. so say alert me when this threshold hits for 6 Mins every hour. Now it wont be a full 6 mins, rather the sum of the mins where the threshold was breached in your 1 hour slot. So, 1 min of high CPU every 10 mins will trigger the alert, even though there are 9 mins in-between each.

topic Understanding the High CPU Throttling Alert in Alerting

Understanding the High CPU Throttling Alert

Re: Understanding the High CPU Throttling Alert