vice</i> rather than process.
	It sends queries to PostgreSQL via pgpool which is being monitored
	by watchdog and watchdog checks the response.
	Also watchdog monitors connections to up stream servers
	(application servers etc.) from the pgpool.
	The connection between the up stream servers and the pgpool is monitored as service of pgpool.
	</p>

	<li>Mutual monitoring of watchdog processes</li>
	<p>
	watchdog processes exchange information on the monitored servers
	to keep the information up to date,
	and