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manual:config:triggers

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3 Triggers

Overview

Triggers are logical expressions that are created to represent the current system state.

A trigger may have the following status:

VALUE DESCRIPTION
OK This is a normal trigger state. Called FALSE in older Zabbix versions.
PROBLEMNormally means that something happened. For example, the processor load is too high. Called TRUE in older Zabbix versions.
UNKNOWNIn this case, Zabbix cannot evaluate the trigger expression. This may happen because of several reasons:
- server is unreachable
- trigger expression cannot be evaluated
- trigger expression has been recently changed

Trigger status (the expression) is recalculated every time Zabbix server receives a new value that is part of the expression.

If time-based functions (nodata(), date(), dayofmonth(), dayofweek(), time(), now()) are used in the expression, the trigger is recalculated every 30 seconds.

You can build trigger expressions with different degrees of complexity.