Queues are fine, but: 1) Queues should be of finite size (exactly what size is entirely application dependent, but the point is that it's almost never ok to le

Queues are fine, but: 1) Queues should be of finite size (exactly what size is entirely application dependent, but the point is that it's almost never ok to let a queue grow indefinitely). 2) When a queue is full, producers should often be blocked (backpressure). Obviously it depends a lot on the particular use case, but IME it's usually risky to think that a 'sufficiently large' queue is going to be an acceptable solution.