High memory utilization trigger from the Linux Template - don't understand it

[Baymon]

Hi,

i have this trigger from a linxu tempalte:

Name: High memory utilization ( >{$MEMORY.UTIL.MAX}% for 5m)

Expression: min(/server/vm.memory.size[pavailable],5m)>{$MEMORY.UTIL.MAX}

$MEMORY.UTIL.MAX = 90

The trigger should warn for low memory availability.

From my understanding this is wrong.

https://www.zabbix.com/documentation/current/en/manual/appendix/items/vm.memory.size_params

pavailable - 'available' memory as percentage of 'total' (calculated as available/total*100)
pused - 'used' memory as percentage of 'total' (calculated as used/total*100)

If i have constantly 95% available it will warn.
If i have constantly 5% available it will not warn.

Shouldn't it be:

Expression: (100 - min(/server/vm.memory.size[pavailable],5m)) > {$MEMORY.UTIL.MAX}

or

Expression: min(/server/vm.memory.size[pused],5m)>{$MEMORY.UTIL.MAX}

Strange thing is, on some hosts the expression from the template seems to work, on another host not. I'm confused. Thanks for you help

[Markku]

Hi, you are right, the trigger is not correct. You can download the latest templates from https://git.zabbix.com/projects/ZBX/...e/templates/os if you like to compare them.

Strange thing is, on some hosts the expression from the template seems to work, on another host not. I'm confused.

In that case there is some difference between the host configurations. Feel free to show us actual configuration screenshots if you need help identifying the differences.

Markku

[Baymon]

This is the template is use, i imported it yesterday. However, i imported it once again and now it is working. Thank you very much.