> For us, increasing the memory for a Lambda from 128 megabytes to 2.5 gigabytes gave us a huge boost.
> The number of Lambda invocations shot up almost 40x.
One thing I've learned from talking to AWS support is that increasing memory also gets you more vCPUs per container.
-----
Serverless is great in scaling and handling bursts, but you may find it VERY difficult in terms of testing and debugging.
A while back I started using an open source tool called localstack[1] to mirror some AWS services locally. Despite some small discrepancies in certain APIs (which are totally expected), it's made testing a lot easier for me. Something worth looking into if testing serverless code is causing you headaches.