When deploying an AMI in AWS you must select the desired number of vCPUs, the amount of Memory and the amount of Storage. This document explains what is recommended for PAM.
When deploying an AMI in AWS you must select the desired number of vCPUs, the amount of Memory and the amount of Storage. Product Management recommends a minimum of 8 vCPUs and 15 Gb of Memory. This would be good for a test system. As an example, the c4.2xlarge AMI type comes with these settings. It also comes with EBS storage, as opposed to SSD. EBS storage may be detached and reattached. You can use it to take snapshots of your PAM instance, and revert to an earlier state by reattaching a previous snapshot. You can also specify how much storage to use. They physical appliance comes with 80 Gb. You might want to match this for consistency. Take a look at the other choices AWS offers, and choose the one that makes the most sense for your environment.