check process postgresql with pidfile /var/run/postgresql/9.0-main.pid
    group database
    start program = "/etc/init.d/postgresql start"
    stop  program = "/etc/init.d/postgresql stop"
    #if failed unixsocket /var/run/postgresql/.s.PGSQL.5432 protocol pgsql then restart
    #if failed unixsocket /var/run/postgresql/.s.PGSQL.5432 protocol pgsql then alert
    if failed host localhost port 5432 protocol pgsql then restart
    #if failed host localhost port 5432 protocol pgsql then alert
    if 5 restarts within 5 cycles then timeout