 to allow watchdog processes to mutually monitor each other. 
	</p>

	<li>Changing active/standby state in case of certain faults detected</li>
	<p>
	When a fault is detected in the pgpool service, watchdog notifies the other watchdogs of it.
	Watchdogs decide the new active pgpool if previous active pgpool is broken
	by voting and change active/standby state.
	</p>

	<li>Automatic virtual IP address assigning synchronous to server switching</li>
	<p>
	When a standby pgpool server promotes to active, the ne