AWS Lambda dynamically scales capacity in response to increased traffic. However, there's a limited number of an executed function's code at any given time. This number is called concurrent execution, and it's defined per AWS region. The default limit of concurrency is 1,000 per AWS region. So, what happens if your function crosses this defined threshold? Read on to find out.
Concurrent execution
Lambda throttling
Lambda applies throttling (rate limiting) to your function if the concurrent execution count is exceeding the limit. Hence, the remaining incoming requests won't invoke the function.
The invoking client is responsible for retrying the failed requests due to throttling by implementing a back-off...
