Letting teams self-serve XaaS is how you get 50 dramatically mis-sized and ill-configured DB instances in prod. This team thought they’d have 1000 QPS, and have

Letting teams self-serve XaaS is how you get 50 dramatically mis-sized and ill-configured DB instances in prod. This team thought they’d have 1000 QPS, and have an instance that’s 50x as large as necessary. This team doesn’t know what IOPS are but figured they’d better have a lot of them, so they’re paying thousands per month for an io2 drive when the entire dataset fits comfortably into memory. This team has no idea (fair – there are a million knobs) how to configure Postgres, and the defaults suck, so they’re getting 1/4 the performance that they’re paying for. IaC can be done poorly, just like anything, but at least if someone knows the underlying tech that they’re modularizing, downstream consumers won’t each have to relearn it.