Amazon EC2 Spot Workshops > Running Efficient and Resilient Workloads with Amazon EC2 Auto Scaling > Amazon EC2 Auto Scaling > Review the outcome of predictive scaling
Review the outcome of predictive scaling
Verify predictive scaling policy in AWS Console
Predictive scaling scales the number of instances at the beginning of each hour.
- Navigate to the Auto Scaling console, click on Auto Scaling group
ec2-workshop-asg - Click on tab Automatic scaling
- A new policy has been created under Predictive scaling policies
At the head of next hour, predictive scaling is forecasting capacity of 5 instances
Challenges
Do you know at what time predictive scaling will start launching instances? Expand to see the answer.
Predictive scaling starts launching instances 5 minutes before the head of the hour, because you have set SchedulingBufferTime as 300 seconds (5 minutes).
Predictive scaling starts launching instances only beginning of each hour, therefore you have to wait for the current hour to end before you can see the actual launch of 5 instances. To save time and continue with the workshop you can back to this step by end of hour and compare ASG activity.
Do you know the AWS CLI command to verify the created predictive policy? Expand to see the answer.
aws autoscaling describe-policies \
--auto-scaling-group-name 'ec2-workshop-asg'