Why has an anomaly been triggered?

Refer to Exhibit:

Why has an anomaly been triggered?
A . Because the CPU usage crossed the blue band.
B. Because the blue band range increased over the last 2 days
C. Because the CPU usage dropped belon’ 20%
D. Because the CPU usage reached 100%

View Answer

Answer: A

Explanation:

Nutanix leverages a method for determining the bands called ‘Generalized Extreme Studentized Deviate Test’. A simple way to think about this is similar to a confidence interval where the values are between the lower and upper limits established by the algorithm.

Another web source3 shows an example of how anomaly detection works in Nutanix Prism Central. In the video, you can see that when the observed value of a metric deviates significantly from the predicted value based on historical data, an anomaly event is triggered and displayed on a chart.

Therefore, by comparing the observed values with the predicted values based on historical data, Nutanix anomaly detection can identify abnormal behavior and alert you accordingly.