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Lambda  >  Operations  >  put_function_concurrency

put_function_concurrency

Operation

put_function_concurrency async 

put_function_concurrency(input: PutFunctionConcurrencyInput, plugins: list[Plugin] | None = None) -> PutFunctionConcurrencyOutput

Sets the maximum number of simultaneous executions for a function, and reserves capacity for that concurrency level.

Concurrency settings apply to the function as a whole, including all published versions and the unpublished version. Reserving concurrency both ensures that your function has capacity to process the specified number of events simultaneously, and prevents it from scaling beyond that level. Use GetFunction to see the current setting for a function.

Use GetAccountSettings to see your Regional concurrency limit. You can reserve concurrency for as many functions as you like, as long as you leave at least 100 simultaneous executions unreserved for functions that aren't configured with a per-function limit. For more information, see Lambda function scaling.

Parameters:

Name Type Description Default
input PutFunctionConcurrencyInput

An instance of PutFunctionConcurrencyInput.

 required
plugins list[Plugin] | None

A list of callables that modify the configuration dynamically. Changes made by these plugins only apply for the duration of the operation execution and will not affect any other operation invocations.

 None

Returns:

Type Description
PutFunctionConcurrencyOutput

An instance of PutFunctionConcurrencyOutput.

Input

PutFunctionConcurrencyInput dataclass

Dataclass for PutFunctionConcurrencyInput structure.

Attributes

function_name class-attribute instance-attribute 
function_name: str | None = None

The name or ARN of the Lambda function.

Name formats

  • Function name -- my-function.

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

  • Partial ARN -- 123456789012: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.

reserved_concurrent_executions class-attribute instance-attribute 
reserved_concurrent_executions: int | None = None

The number of simultaneous executions to reserve for the function.

Output

PutFunctionConcurrencyOutput dataclass

Dataclass for PutFunctionConcurrencyOutput structure.

Attributes

reserved_concurrent_executions class-attribute instance-attribute 
reserved_concurrent_executions: int | None = None

The number of concurrent executions that are reserved for this function. For more information, see Managing Lambda reserved concurrency.