Calculated formula doesn't accept perf_counter

[Kaimor777]

Hi,
I'm trying to create a calculated item based on the performance counter.
I tried to use this formula

last("perf_counter["\Process(w3wp#4)\% Processor Time",10]")/last(system.cpu.num)

But received an error

Cannot evaluate function "last()": item "MNN FR: perf_counter["\Process(w3wp#4)\% Processor Time",10]" does not exist.

I tried another syntax:
last("perf_counter[\Process(w3wp#4)\% Processor Time,10]")/last(system.cpu.num)
With same result.

I saw pretty same problem from 2010 at this topic https://www.zabbix.com/forum/zabbix-...-perf_counterf
but the solution used there didn't work for me neither.

Any help will be appreciated.

[Hamardaban]

Use the exactly the same key in the expression as in the item. Escape inner quotes using \.

[Kaimor777]

Which quotes are inner? Those before perf_counter and after ] also counts as inner?

[Hamardaban]

Inner (internal) - this is part of the key

[Nariman_tj]

Kaimor777

as Hamardaban said, you should remove " in the parts which have been not include in your key

for instance you have an item like: grpsum["sherab","xc1",last]

you must make a formula that contain
2*last("grpsum["sherab","xc1",last]") and as you see the parts that have not containted quotation before calculated item would have not contain any quotation after using calculated items.


as an other example i can say if you want to add these two items : net.if.out["ens160"] +net.if.in["ens160"]


for last("net.if.out["ens160"]")+last(net.if.in["ens160"]")