demonitor flush can be harmful in some instances as it invokes a selective receive to yank the down message from your process's mailbox. In the event that you a

demonitor flush can be harmful in some instances as it invokes a selective receive to yank the down message from your process's mailbox. In the event that you are demonitor+flushing on a process that has a growing message queue, every flush gets more and more costly - especially if the monitor has already delivered a DOWN message for it to yank. it's almost always better to ignore down messages that you don't care about.