AWS Lambda now supports three new CloudWatch metrics AsyncEventsReceived, AsyncEventAge and AsyncEventsDropped, to monitor the performance of asynchronous event processing in the AWS GovCloud (US) Regions. Until now, Lambda customers had limited visibility into the processing of asynchronous requests, and had to rely on Lambda service teams to resolve any processing delays leading to inefficiencies in asynchronous event processing. With these new metrics, customers gain better visibility into their asynchronous invocations and can track the events sent to Lambda, monitor delays in event processing and take corrective actions if required.
Source:: Amazon AWS