{fieldname}.critical
{fieldname}.critical defines low and/or high thresholds that will be used by munin-limits to send a critical alert to external systems like Nagios if the read value is outside the given range.
Properties
| Attribute name | {fieldname}.critical |
| Value | min:max, min: or :max |
| Allowed characters | [0-9:] |
| Spaces allowed | No |
| Context | Datasource-specific plugin attributes |
| Required | No |
| Default value | None |
Example
In the example below, munin-limits will send an alert with "critical" level if the number of pending packages is higher than (or, although improbable, lower than) 0 packages.
# munin-run apt config graph_title Pending packages graph no pending.label pending pending.critical 0:0 hold.label hold
