Database
Amazon RDS
- Timebilled
- Bytesbilled
- Callsnot billed
In one line
The instance clock runs from create to delete, with storage and backups alongside. I/O only meters on magnetic.
What gets missed
RDS does not charge on its own side of a cross-AZ hop, so an app reaching the DB across an AZ pays the EC2 side twice and the RDS side not at all. Multi-AZ still doubles the instance and storage lines.
Find it on your bill
Filter Cost Explorer or your Cost and Usage Report by these usage types. A usage type with no region prefix means us-east-1.
InstanceUsageMulti-AZUsageRDS:GP3-StorageRDS:ChargedBackupUsage
Bills the same way
These services turn exactly the same meters, so what you learn here transfers.