Where are SAP's 2,000+ parameters actually stored, and what are they called as a result?

When an operation mode switches, what actually happens to the running work processes?

What's the difference between the default profile and an instance profile?

How does parameter evaluation order differ for static vs dynamic parameters?

In RZ10 extended maintenance, what does double-clicking a parameter show?

How can you change a dynamic parameter without a stop/start cycle?

A parameter changed online in RZ11 reverts after the next restart — why, and how do you make it permanent?