Overview of Anomaly Detections calculations
Anomaly Detections are calculated by gathering a statistically significant number of values for the monitored event or dimension over time and then calculating the standard deviation for the sampled values.
Anomaly Detections can be calculated on a daily or an hourly basis. Tracking hourly Anomaly Detections requires more storage capacity.
The calculated value of the standard deviation for today is based on the values that are calculated from the configured set of prior days.
- Anomaly Detections may be calculated based on a consecutive days or week-over-week method. The method in use is configurable.
The number of days over which the Anomaly Detection is calculated is called the rolling window.
- By default, the minimum number of days to complete a valid calculation
is
4
, and the maximum is16
. - The size of the rolling window may impact how quickly the Data Collector is able to complete its updates.
- It does not affect Anomaly Detection data storage.