This epic is to track the migration from x86 based RDS instances to ARM based instances to help reduce cost.  We have created 2 jiras per RDS DB, one for stage and one for prod.  App SRE has provided a runbook, here is a copy of the App SRE email for reference:

"If you have RDS instances managed by app-interface, please upgrade to the corresponding Graviton instance type.

See [1] for detailed steps and background information and [2] for more cost saving details.

Don't hesitate to reach out in #sd-app-sre and #sd-cost-optimization if you have any question.

Sincerely,

The AppSRE Team.

[1] https://gitlab.cee.redhat.com/service/app-interface/-/blob/master/docs/app-sre/runbook/aws-rds-graviton.md?ref_type=heads
[2] https://docs.google.com/document/d/1sM0veU1uk9LaoduNqLUzAT07o6rNYenv-l7OmuXX00g/edit?usp=sharing "

If your current DB type is not covered in the upgrade paths have a look at:

https://aws.amazon.com/blogs/aws/new-amazon-rds-on-graviton2-processors/  

And choose the comparable Gravaton instance type.

For reference here is the cost savings DOC provided by App SRE:

https://docs.google.com/document/d/1sM0veU1uk9LaoduNqLUzAT07o6rNYenv-l7OmuXX00g/edit