REL01-BP01 Aware of service quotas and constraints
You are aware of your default quotas and quota increase requests for your workload architecture. You additionally know which resource constraints, such as disk or network, are potentially impactful.
Service Quotas is an AWS service that helps you manage your quotas for over 100 AWS services from one location. Along with looking up the quota values, you can also request and track quota increases from the Service Quotas console or via the AWS SDK. AWS Trusted Advisor offers a service quotas check that displays your usage and quotas for some aspects of some services. The default service quotas per service are also in the AWS documentation per respective service, for example, see Amazon VPC Quotas. Rate limits on throttled APIs are set within the API Gateway itself by configuring a usage plan. Other limits that are set as configuration on their respective services include Provisioned IOPS, RDS storage allocated, and EBS volume allocations. Amazon Elastic Compute Cloud (Amazon EC2) has its own service limits dashboard that can help you manage your instance, Amazon Elastic Block Store (Amazon EBS), and Elastic IP address limits. If you have a use case where service quotas impact your application’s performance and they are not adjustable to your needs, then contact AWS Support to see if there are mitigations.
Common anti-patterns:
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Deploying a workload with no regard of the service quotas on the AWS services used.
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Designing a workload without investigating and accommodating for AWS services' design constraints.
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Deploying a workload with significant use that replaces a known existing workload without configuring the necessary quotas or contacting AWS Support in advance.
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Planning an event to drive traffic to your workload, but not configuring the necessary quotas or contacting AWS Support in advance.
Benefits of establishing this best practice: Being aware of the service quotas, API throttling limits, and design constraints will allow you to account for these in your design, implementation, and operation of the workload.
Level of risk exposed if this best practice is not established: High
Implementation guidance
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Review AWS service quotas in the published documentation and Service Quotas
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Determine all the services your workload requires by looking at the deployment code.
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Use AWS Config to find all AWS resources used in your AWS accounts.
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You can also use your AWS CloudFormation to determine your AWS resources used. Look at the resources that were created either in the AWS Management Console or via the list-stack-resources CLI command. You can also see resources configured to be deployed in the template itself.
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Determine the service quotas that apply. Use the programmatically accessible information via Trusted Advisor and Service Quotas.
Resources
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