Presumably one would use autotune to find optimized parameters, and then roll those out via change control, either one parameter at a time, or a mix of paramete

Presumably one would use autotune to find optimized parameters, and then roll those out via change control, either one parameter at a time, or a mix of parameters across the systems. Alternatively: if you have a fleet of thousands of machines you can very easily do a binary search with them to a)establish the problem with the auto-tuner and then b)which of the changes it settled on are causing your problems. I get the impression you've never actually managed a "fleet" of systems, because these techniques would have immediately occurred to you.