> For the complete documentation index, see [llms.txt](https://awsnotes.dendron.so/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://awsnotes.dendron.so/internet-of-things-iot/aws-iot-events/common/monitoring-with-alarms.md).

# Monitoring with alarms

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## Managing alarm notifications

* **Note**\
  AWS Lambda retries function errors twice. If the function doesn't have enough capacity to handle all incoming requests, events might wait in the queue for hours or days to be sent to the function. You can configure an undelivered-message queue (DLQ) on the function to capture events that weren't successfully processed. For more information, see [Asynchronous invocation](https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html) in the *AWS Lambda Developer Guide*.