If only part of your “application” has more load than others what do you suggest?

That instead of being able to granular take part of the application that had a larger load, and run it on a Firecracker micro VM (the underlying VM for lambda and Fargate) with 256MB RAM and 1 core, we add enough VMs to scale a monolithic app - even the parts that don’t need it on a full scale VM with 8GB RAM and four cores?

We did actually have to do something similar for a legacy Windows app. We scaled the entire process up based on the number of messages in the queue. It was extremely wasteful. It required at least a 4GB/2 CPU VM compared.