Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> Alvaro Herrera wrote:
>> What will happen when the ring is full? NOTIFY blocks?
>>
> An error, I think, don't you? Blocking seems totally unacceptable.
That seems like a curious answer. Imagine the documentation:
"NOTIFY may fail for no reason whatsoever." I'd vote for blocking.
Otherwise, apps have to treat NOTIFY as an unreliable communication
mechanism, which reduces its use-case to approximately nil.
regards, tom lane