Service Limits

There are various limits that you should be aware of when it comes to scaling a Service in AWS.

Default limit of StartExecution <= 50 TPS

Each Workflow Execution is given its own AWS CloudWatch LogStream. The CreateLogStream API is limited to 50 TPS per account/region by default. This limits the StartWorkflow API to 50 TPS.

This account can be raised by submitting a request to AWS for the AWS account and region. See

For more information, see:

• AWS Service Quotas
• AWS CloudWatch Logs Service Limits

Task Response must be <= 256KB

Size of the response from a task has a hard limit of <= 256KB because of its dependency on SQS SendMessage to communicate the response.