Amazon RDS Metric Events: Migrating from Classic "built-in" Services Metrics to Cloud Services Metrics

[ASE]

Good afternoon.

We are in the process of migrating Amazon RDS from Classic Services to Cloud Services in Dynatrace.

Based on the documentation I read, the built-in RDS alerts shown below will not be available once we migrate.

Because of this, I'm working on re-creating these alerts using the new Cloud Services Metrics.

However, I'm stuck trying to duplicate the "Detect RDS running out of memory" alert.

How do I combine the "Freeable Memory" metric with the "Swap Usage" metric in my Metric Event?

If I'm reading this correctly, both conditions need to exist in order to trigger this alert.

[ASE]

What about the RDS Free Storage Space % metric?

The % metric is not available in Amazon RDS Cloud Services. It's using the number of Bytes.

Classic Services

Cloud Services

I suspect we could use a Metric Expression to calculate the Free Storage Space %, but how is that possible if we are not ingesting an "allocated storage" metric from Amazon RDS?

Any recommendations on how to recreate this Classic alert using the Cloud metrics?

[ASE · Accepted solution]

Solution:

This is what we used to build the Cloud Services version of this Classic "built-in" RDS running out of memory alert:

ext:cloud.aws.rds.freeableMemory:splitBy("dt.entity.custom_device"):filter(series(avg,lt(100000000))):count:default(0, always) 
+ 
ext:cloud.aws.rds.swapUsage:splitBy("dt.entity.custom_device"):filter(series(avg,gt(1000000000))):count:default(0, always)