Idle EC2 Instance

An idle EC2 instance has had consistently low CPU usage for the last 30 days, and may be scaled down or sometimes deleted to reduce costs.

To be "Idle" an EC2 instance

  • Has had less than 15% average CPU usage each hour for the last 30 days

Over provisioned EC2 Instances

An over provisioned EC2 instance is under utilised and could be downsized to a smaller instance type.

This recommendation depends on the Amazon Compute Optimizer, https://aws.amazon.com/compute-optimizer/, which must be opted-in on your account.