How to monitor and check if IoT message broker quotas have been exceeded

Question

Hello everyone,

How do I check whether the following quotas for the IoT message broker have been exceeded?

- Connect requests per second per account
- Inbound publish requests per second per account
- Outbound publish requests per second per account
- Subscriptions per account
- Subscriptions per second per account

I am planning to create a CloudWatch alarm for those, but I'm not sure which metric below (or which combination of metrics) corresponds to which quota above:

- Connect.Success
- Connect.Throttle
- PublishIn.Success
- PublishIn.Throttle
- PublishOut.Success
- PublishOut.Throttle
- Subscribe.Success
- Subscribe.Throttle
- Unsubscribe.Success
- Unsubscribe.Throttle

Please help, thanks.

Answer

Hi Perry. These resources are likely useful for you:

* https://www.youtube.com/watch?v=vQRBQ5yhEP0
* https://aws.amazon.com/blogs/iot/monitoring-your-iot-fleet-using-cloudwatch/

> How do I check whether the following quotas for the IoT message broker have been exceeded?

The `.Throttle` metrics will only exist in your account if you have indeed exceeded the relevant quota and throttling occurred.

Here is a description of all the metrics you listed: https://docs.aws.amazon.com/iot/latest/developerguide/metrics_dimensions.html#message-broker-metrics

How to monitor and check if IoT message broker quotas have been exceeded

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