Dedicated Instances – Amazon Elastic Compute Cloud

Because of the burstable nature of the T3 instance types, we recommend that you monitor how your T3 instances use the CPU resources of the dedicated hardware for the best performance. T3 Dedicated Instances are intended for customers with diverse workloads that display random CPU behavior, but that ideally have average CPU usage at or below the …

https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/dedicated-instance.html