AWS Aurora missing metrics like "[Billed] Volume Read IOPS (Count), [Billed] Volume Read IOPS (Count)" etc in CloudWatch

Question

I'm missing metrics like [Billed] Volume Read IOPS (Count), [Billed] Volume Read IOPS (Count) in CloudWatch.

Although these metrics are visible in RDS -> CloudWatch. RDS CloudWatch metrics

Is it possible the find these metrics in CloudWatch so I can create alarm for them?

Update: it turns out that these metrics are available as:

VolumeBytesUsed -> [Billed] Volume bytes used
VolumeReadIOPs -> [Billed] Volume read IOPs
VolumeWriteIOPs -> [Billed] Volume write IOPs

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/Aurora.Monitoring.Metrics.RDSAvailability.html

Answer 1

These metrics are available as VolumeBytesUsed, VolumeReadIOPs, VolumeWriteIOPs (note the "Volume" prefix).

I will take the opportunity to point out that "IOPS" is a misnomer for these metrics; they are really "IOP5M" or "IOs per 5 minutes." (Thanks, AWS.)

Therefore there is a ~300x difference between ReadIOPs and VolumeReadIOPs.

There is not a linear relationship between WriteIOPs and VolumeWriteIOPs because the latter is boxcared into 8KB(?) chunks and the former is not.

Very confusing, but I hope that helps.