PutProvisionedConcurrencyConfig - Amazon Lambda
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 (PDF).


Adds a provisioned concurrency configuration to a function's alias or version.

Request Syntax

PUT /2019-09-30/functions/FunctionName/provisioned-concurrency?Qualifier=Qualifier HTTP/1.1 Content-type: application/json { "ProvisionedConcurrentExecutions": number }

URI Request Parameters

The request uses the following URI parameters.


The name or ARN of the Lambda function.

Name formats
  • Function namemy-function.

  • Function ARNarn:aws:lambda:us-west-2:123456789012:function:my-function.

  • Partial ARN123456789012:function:my-function.

The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.

Length Constraints: Minimum length of 1. Maximum length of 140.

Pattern: (arn:(aws[a-zA-Z-]*)?:lambda:)?([a-z]{2}(-gov)?-[a-z]+-\d{1}:)?(\d{12}:)?(function:)?([a-zA-Z0-9-_]+)(:(\$LATEST|[a-zA-Z0-9-_]+))?

Required: Yes


The version number or alias name.

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: (|[a-zA-Z0-9$_-]+)

Required: Yes

Request Body

The request accepts the following data in JSON format.


The amount of provisioned concurrency to allocate for the version or alias.

Type: Integer

Valid Range: Minimum value of 1.

Required: Yes

Response Syntax

HTTP/1.1 202 Content-type: application/json { "AllocatedProvisionedConcurrentExecutions": number, "AvailableProvisionedConcurrentExecutions": number, "LastModified": "string", "RequestedProvisionedConcurrentExecutions": number, "Status": "string", "StatusReason": "string" }

Response Elements

If the action is successful, the service sends back an HTTP 202 response.

The following data is returned in JSON format by the service.


The amount of provisioned concurrency allocated. When a weighted alias is used during linear and canary deployments, this value fluctuates depending on the amount of concurrency that is provisioned for the function versions.

Type: Integer

Valid Range: Minimum value of 0.


The amount of provisioned concurrency available.

Type: Integer

Valid Range: Minimum value of 0.


The date and time that a user last updated the configuration, in ISO 8601 format.

Type: String


The amount of provisioned concurrency requested.

Type: Integer

Valid Range: Minimum value of 1.


The status of the allocation process.

Type: String



For failed allocations, the reason that provisioned concurrency could not be allocated.

Type: String


For information about the errors that are common to all actions, see Common Errors.


One of the parameters in the request is not valid.

HTTP Status Code: 400


The resource already exists, or another operation is in progress.

HTTP Status Code: 409


The resource specified in the request does not exist.

HTTP Status Code: 404


The Amazon Lambda service encountered an internal error.

HTTP Status Code: 500


The request throughput limit was exceeded. For more information, see Lambda quotas.

HTTP Status Code: 429

See Also

For more information about using this API in one of the language-specific Amazon SDKs, see the following: