One tenant submits fifty thousand jobs and everyone else waits four hours. Design the queue so that cannot happen.

A single FIFO queue is a first-come-first-served promise to whoever submits fastest. Fairness needs per-tenant queues and a scheduler that picks between them, and priority without fairness just moves the problem.

Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.