# you can disable an alarm notification by setting the 'to' line to: silent

# ${tcp_max_connections} may be nan or -1 if the system
# supports dynamic threshold for TCP connections.
# In this case, the alarm will always be zero.

      alarm: tcp_connections
         on: ip.tcpsock
      class: Workload
       type: System
  component: Network
host labels: _os=linux
       calc: (${tcp_max_connections} > 0) ? ( ${connections} * 100 / ${tcp_max_connections} ) : 0
      units: %
      every: 10s
       warn: $this > (($status >= $WARNING ) ? ( 60 ) : ( 80 ))
       crit: $this > (($status == $CRITICAL) ? ( 80 ) : ( 90 ))
      delay: up 0 down 5m multiplier 1.5 max 1h
    summary: System TCP connections utilization
       info: IPv4 TCP connections utilization
         to: sysadmin
