How to fetch metrics from different Pub/Sub resource types with Google Monitoring Query Language?

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Alexandre Figura

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Apr 14, 2021, 9:39:08 AM4/14/21

to Google Cloud Pub/Sub Discussions

I am trying to create an alert on Google Cloud, to be notified about Pub/Sub messages which cannot be forwarded to a dead-letter topic, using Google Monitoring Query Language.

On Google documentation, it is said:

> To verify that Pub/Sub is forwarding undeliverable messages, you can compare the subscription/dead_letter_message_count metric with the topic/send_message_operation_count metric from the topic that Pub/Sub forwards these messages to.

However, when trying to create an alert condition with the Query Editor, I get the following error:

> Metric 'pubsub.googleapis.com/topic/send_message_operation_count' is not compatible with resource 'pubsub_subscription'. Consider using the following resource(s): 'pubsub_topic'.

I am wondering then if it is possible to fetch topic and subscription metrics with the Google Monitoring Query Language, and if yes, how?

Kir Titievsky

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Apr 14, 2021, 10:51:41 AM4/14/21

to Alexandre Figura, Google Cloud Pub/Sub Discussions

could you share your full query?

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