The way we work this is that DevOps builds the systems, and the performance testers tune the configs based on their testing. Performance testing is really not t

The way we work this is that DevOps builds the systems, and the performance testers tune the configs based on their testing. Performance testing is really not the right word for what they do; it's really performance engineering. Regardless of whether you use DevOps or not, if scalability is an issue, someone needs to be doing performance testing and sizing to have a rough idea of how many users per node you can support. It's part of the QA cycle; and that doesn't go away with DevOps.