Trigger of a calculated item

[nerijus]

Hello,

I changed "Number of running processes apache" from type "Zabbix agent" to "Calculated" and Key from proc.num[httpd] to proc.num[httpd]+proc.num[apache2]. Now I want to create trigger when item is < 1, ho do I do that?
{Template_Linuxroc.num[httpd]+proc.num[apache2]}<1 and {Template_Linux:"proc.num[httpd]+proc.num[apache2]"}<1 gives an error:
An item key must be used in trigger expression.

[richlv]

if you want to do that, you must have those items you reference. so with your approach you would end up with 3 items - two to count different apache process names, and one to sum them.
i'd suggest having two items and working with them in the trigger expression instead. actually, zabbix appliance that was just releases has an example just like that, i'd suggest checking it out