Unanswered: PMON do not activate at once to kill Server Process ?
In theory, if a connection from client and server is disconnected suddenly (ex: power-cut, out of network cable ...) then Proccess Monitor (PMON) will be activated after several seconds to free all resources of that client.
But in practice, it' not correct, the Server Process that (exist on Oracle Server) serve for disconnected client process do not be killed immediately although I kill it by command "alter system kill session '8,13'". It's just killed after over 15 minutes.
I don't know why PMON do not activate to kill it at once. and How to kill Server Process immediatly ?