check process nginx with pidfile /var/run/nginx.pid
	group www-data
	start program = "/etc/init.d/nginx start"
	stop program = "/etc/init.d/nginx stop"
	if children > 250 then restart
	if loadavg(5min) greater than 2 for 8 cycles then stop
        if failed host localhost port 80 type tcp protocol http for 3 times within 5 cycles then alert
	if 3 restarts within 5 cycles then alert
	if 5 restarts within 5 cycles then timeout