Amazon ECS service quotas
When you create your AWS account, we set default quotas (also referred to as limits) on your AWS resources on a per-Region basis. If you attempt to exceed the quota for a resource, the request fails.
The Service Quotas console is a central location where you can view and manage your quotas for AWS services, and request a quota increase for many of the resources that you use. Use the quota information that we provide to manage your resources. Plan to request any quota increases in advance of the time that you'll need them.
Amazon ECS Managed Instances follow the Amazon EC2 quotas. For more information, see Amazon EC2 service quotas in the Amazon EC2 User Guide.