Oracle has a long history of not documenting all of this stuff and instead suggesting you should hire one of their army of consultants to help tune the OS or Database for you.
If we are talking about tuning for a specific workload, what’s wrong with that?
If your in-house DBA doesn’t have the experience to perform the specific tuning required, then that’s what support contracts are for
The documentation can’t cover every customer’s use case and configuration. That’s just enabling folk to blindly copy inappropriate sysctls they don’t understand like they are building gentoo kernels.
You don't need to cover every use case. You just need to document what stuff does and how it affects to various workloads. A good engineer can from that information infer what they need for their workload. But not documenting that a control exists so that you can be bill you for consulting puts you in my "will not use" category.
If your in-house DBA doesn’t have the experience to perform the specific tuning required, then that’s what support contracts are for
The documentation can’t cover every customer’s use case and configuration. That’s just enabling folk to blindly copy inappropriate sysctls they don’t understand like they are building gentoo kernels.