Quotas - Amazon Key Management Service
Services or capabilities described in Amazon Web Services documentation might vary by Region. To see the differences applicable to the China Regions, see Getting Started with Amazon Web Services in China.

Quotas

To make Amazon KMS responsive and performant for all users, Amazon KMS applies two types of quotas, resource quotas and request quotas. Each quota is calculated independently for each Region of each Amazon Web Services account.

All Amazon KMS quotas are adjustable, except for the key policy document size resource quota, the custom key store resource quota, and the Amazon CloudHSM key store request quota. To request a quota increase, see Requesting a quota increase in the Service Quotas User Guide. To request a quota decrease, to change a quota that is not listed in Service Quotas, or to change a quota in an Amazon Web Services Region where Service Quotas for Amazon KMS is not available, please visit Amazon Web Services Support Center and create a case.