PMON or Process monitorback,”Monitors the other background processes and performs process recovery when a server or dispatcher process terminates abnormallyPMON periodically performs cleanup of all the following:*Processes that died abnormally*Sessions that were killedtimeout*Detached network connections which have exceeded their idle timeoutIn addition, PMON monitors, spawns
and stops the following as needed:*Dispatcher and shared server processes*Job queue processes*Pooled server processes for database resident connection pooling*Restartable background processesPMON is also responsible for registering information about the instance and dispatcher processes with the network listener.”