AWS Certified SysOps Administrator – Associate — Question 439

A company has an Auto Scaling group of Amazon EC2 instances that scale based on average CPU utilization. The Auto Scaling group events log indicates an
InsufficientInstanceCapacity error.
Which actions should a SysOps administrator take to remediate this issue? (Choose two.)

Answer options

• A. Change the instance type that the company is using.
• B. Configure the Auto Scaling group in different Availability Zones.
• C. Configure the Auto Scaling group to use different Amazon Elastic Block Store (Amazon EBS) volume sizes.
• D. Increase the maximum size of the Auto Scaling group.
• E. Request an increase in the instance service quota.

Correct answer: A, B

Explanation

The InsufficientInstanceCapacity error occurs when AWS does not have enough host capacity in a specific Availability Zone to fulfill the request for a particular EC2 instance type. To mitigate this, a SysOps administrator can configure the Auto Scaling group to use other Availability Zones or change the instance type to one with available capacity. Modifying EBS volumes, increasing the Auto Scaling group's maximum size, or requesting a service quota increase (which addresses InstanceLimitExceeded, not InsufficientInstanceCapacity) will not resolve this physical hardware constraint.