Posted On: May 3, 2017
AWS Lambda’s default concurrent execution limit has been raised to 1,000 concurrent function executions. Lambda uses a default safety throttle for the number of concurrent executions across all functions in a given region per account. Concurrent executions refers to the number of executions of your function code that are happening at any given time.
To raise the limit above 1,000 concurrent function executions, submit a request to the AWS Support Center by following the steps in our documentation. This feature is available in all regions where Lambda is available.