How to create a Cloudwatch chart of the number Aurora Postgres read instances?

Question

Is it possible to create a Cloudwatch chart of the number of Aurora Postgres read replica instances?

This can be done easily for and EC2 auto-scaling group, but I don't see anything similar for Aurora read instance scaling.

I've searched the documents and list of available Cloudwatch metrics, but I can't find anything.

Thanks!

Answer 1

I had feedback that, in fact, there is no metric for the number of replica instances. But, I found this other post, which provides a work-around:

Amazon RDS: plot number of instances in CloudWatch

Not the one answer, but the comment to it:

I'm surprised that there's no such metric... Based on your solution I figured out a better version with a custom function: m1/PERIOD(m1) * 60, normalize the sample counts with the period duration.