There's a black box optimizer for databases, which is designed to take the user away from having to find and tweak all the hundreds of possible tunables in the database, https://github.com/cmu-db/ottertune / https://ottertune.cs.cmu.edu/

I keep wanting the same for JVM. It's probably nice that there are so many ways to adjust the JVM to best suit a very wide range of workloads, but from a practical perspective I rarely have spare time to go diving through the guts to experiment. Let me point something at a one-box, and it can tweak parameters to its hearts content, so I can export and apply to the rest of the fleet.