For anyone wondering why it's --window-size and not --evaluation-frequency: you want the average across 5 minutes. With --evaluation-frequency you don't go for averages, you simply check what the given value is at specific intervals.

Correct, Eng reference is here https://docs.microsoft.com/en-us/cli/azure/monitor/metrics/alert?view=azure-cli-latest

az monitor metrics alert create -n alert1 -g {ResourceGroup} --scopes {VirtualMachineID} --condition "avg Percentage CPU > 90" --window-size 5m --evaluation-frequency 1m --action "/subscriptions/<subscriptionId>/resourceGroups/<resourceGroupName>/providers/Microsoft.Insights/actionGroups/<actionGroupName>" apiKey={APIKey} type=HighCPU --description "High CPU" https://learn.microsoft.com/en-us/cli/azure/monitor/metrics/alert?view=azure-cli-latest#az-monitor-metrics-alert-create-examples

Window-size is the correct answer. Get all questions at [email protected]

Got this today. Went with answer here. Score 927

Hello, may I know why Box 1 is 'avg Percentage CPU ', instead of 'Percentage CPU '. It wants to be notified whenever over than 85. Whenever, meaning the maximum, not the average?

Window size is the period of time over which Azure Monitor will collect metrics for a metric alert rule. Evaluation frequency is the frequency with which Azure Monitor will evaluate the metric alert rule for violations. if you set the window size to 5 minutes and the evaluation frequency to 1 minute, Azure Monitor will collect metrics for the previous 5 minutes and then evaluate the metric alert rule for violations every minute. This means that if there is a violation in the 5 minute window, Azure Monitor will detect it within 1 minute. We want to get percent “over a 5 minute period”, we have to use window size parameter. Only use evaluation frequency parameter is not enough for getting question request.

This was part of my exam

1. avg Percentage CPU, 2. window size

az monitor metrics alert create -n alert1 -g {ResourceGroup} --scopes {VirtualMachineID} \ --condition "avg Percentage CPU > 90" --window-size 5m --evaluation-frequency 1m \ --action "/subscriptions/<subscriptionId>/resourceGroups/<resourceGroupName>/providers/Microsoft.Insights/actionGroups/<actionGroupName>" apiKey={APIKey} type=HighCPU \ --description "High CPU"

Box 2: --window-size Time over which to aggregate metrics in "##h##m##s" format. https://learn.microsoft.com/en-us/cli/azure/monitor/metrics/alert?view=azure-cli-latest

Box 2: Window Size az monitor metrics alert create -n alert1 -g {ResourceGroup} --scopes {VirtualMachineID} \ --condition "avg Percentage CPU > 90" --window-size 5m --evaluation-frequency 1m \ --action "/subscriptions/<subscriptionId>/resourceGroups/<resourceGroupName>/providers/Microsoft.Insights/actionGroups/<actionGroupName>" apiKey={APIKey} type=HighCPU \ --description "High CPU"

what is the correct value for box2?

Sure. I know how to use this from the portal and now I have to remember the unfortunate name someone in Microsoft chose for the evaluation time?

--window-size : Time over which to aggregate metrics in "##h##m##s" format.

the param --window size has a typo, missing a dash?

Given answer is correct https://learn.microsoft.com/en-us/cli/azure/monitor/metrics/alert?view=azure-cli-latest#az-monitor-metrics-alert-create az monitor metrics alert create -n alert1 -g {ResourceGroup} --scopes {VirtualMachineID} \ --condition "avg Percentage CPU > 90" --window-size 5m --evaluation-frequency 1m \ --action "/subscriptions/<subscriptionId>/resourceGroups/<resourceGroupName>/providers/Microsoft.Insights/actionGroups/<actionGroupName>" apiKey={APIKey} type=HighCPU \ --description "High CPU"