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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. |
| PROBLEM | Normally means that something happened. For example, the processor load is too high. Called TRUE in older Zabbix versions. |
| UNKNOWN | In 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.