Amazon Aurora T3 DB instance changes

Amazon Aurora T3 DB instances run in Unlimited mode, which means that you will be charged if your average CPU utilization over a rolling 24-hour period exceeds the baseline of the instance. CPU Credits are charged at $0.09 per vCPU-Hour. The CPU Credit pricing is the same for all T3 instance sizes across all regions and is not covered by Reserved Instances.

For more information please see https://aws.amazon.com/rds/postgresql/pricing/