/2017-10-31/functions/{FunctionName}/concurrency

The AWS Lambda multi-region endpoint

http://lambda.{region}.amazonaws.com

PUT

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Concurrency settings apply to the function as a whole, including all published versions and the unpublished version.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 Managing Concurrency.

Request Example

Shell

JavaScript

Java

Swift

curl --location -g --request PUT 'http://lambda.{region}.amazonaws.com/2017-10-31/functions//concurrency' \
--header 'Content-Type: application/json' \
--data-raw '{
    "ReservedConcurrentExecutions": 0
}'

Response Example

200 - Example 1

{
    "ReservedConcurrentExecutions": 0
}

Request

Path Params

Body Params application/json

Examples

Responses

🟢200Success

application/json

Body

🟠480ServiceException

🟠481InvalidParameterValueException

🟠482ResourceNotFoundException

🟠483TooManyRequestsException

🟠484ResourceConflictException

Modified at 2022-09-10 19:49:51

/2017-10-31/functions/{FunctionName}/concurrency

/2019-09-25/functions/{FunctionName}/event-invoke-config