Triggers - Last 'n' values above exact value

[ivanni]

Hello, Zabbix users,

I want to know how to do the following:

I have an item, say CPU steal time, with refresh interval of 60 seconds. I want to create a trigger, which activates only when the last 5 values are above 20% (in my case the last 5 values represent 5 minutes), i.e., every value of the last 5 values is greater than 20. For example:

21 25 24 25 29
|----|----|----|----| >>> TRUE

21 5 24 25 6
|----|----|----|----| >>> FALSE

I know I can use this:
system.cpu.util[,steal].last(#1)}>20 and
system.cpu.util[,steal].last(#2)}>20 and
system.cpu.util[,steal].last(#3)}>20 ... (etc.)

But that's a lot of typing and what about if I want the last 20 values - I am not going to type 20 lines of expressions.

How to do that easily? Thank you!

[ingus.vilnis]

Hello,

Please try this expression.

system.cpu.util[,steal].min(5m)}>20

This will be true if the values for the last 5 minutes have not been lower than 20.

Best Regards,
Ingus

[ivanni]

Thank you, it is working!