Notes on backpressure
Dropping work is a feature. Pretending you did not is the bug.
A system that cannot say no will say nothing at all, eventually.
Notes on systems that mostly work.
Topic
Servers, queues, and the things that page you at 3am.
Dropping work is a feature. Pretending you did not is the bug.
A system that cannot say no will say nothing at all, eventually.
Utilisation above eighty per cent is a decision, not an accident.
Wait time does not climb gently as a system fills up. It climbs like a wall, and the wall is in a place you can calculate in advance.