I'm starting a new job soon and I believe I'll eventually be in the on-call rotation. I've never done on-call in a formal sense. Past jobs I was always pretty junior and I tended to work on mobile apps that don't have all that many emergency problems. The closest I've ever come to a real on-call was helping some charities run their website.
I don't really perform well under pressure and I'm pretty terrified. I've heard that a lot of places have automatic rollbacks and other methods of automatically dealing with things, so pages only really happen when something is really broken.
How do people deal with issues like that? What happens if I'm not able to figure something out within a good time limit?