[simfoo]

Same here. Shared memory is one of those things where the kernel could really help some more with reliable cleanup (1). Until then you're mostly doomed to have a rock solid cleanup daemon or are limited to eventual cleanup by restarting processes. I have my doubts that it isn't possible to get into a situation where segments are being exhausted and you're forced to intervene

(1) I'm referring to automatic refcounting of shm segments using posix shm (not sys v!) when the last process dies or unmaps