Zabbix Triggers Not Fired

[Biju Raymond]

Hi

I have created a Trigger in Zabbix that is supposed to be fired if a host's CPU Usage is more than 90% for 5 continuous minutes.
Here is the Trigger Expression:

avg(/Chat1/system.run[powershell -ExecutionPolicy Bypass -File \\192.168.4.211\PS_Scripts\CPU_Usage.ps1],5m)>90

And here is the CPU_Usage.ps1 script:

try {
# Attempt to fetch the total CPU usage percentage
$cpuUsage = Get-WmiObject -Query "SELECT PercentProcessorTime FROM Win32_PerfFormattedData_PerfOS_Processor WHERE Name='_Total'" |
Select-Object -ExpandProperty PercentProcessorTime

# Check if the CPU usage was successfully retrieved
if ($cpuUsage -ne $null) {
# Output the CPU usage percentage with formatting for readability
Write-Output $cpuUsage
}
else {
Write-Output "Failed to retrieve CPU usage information."
}
} catch {
# Handle errors gracefully
Write-Output "An error occurred while trying to retrieve CPU usage information: $_"
}

I created a python script that could spike the CPU Usage to 100% (Verified in Task Manager's 'Performance' Tab as well).
But though this python script spikes the CPU Usage to 100% for more than 5 minutes, The trigger is not being fired.
I need help!

[cyber]

And does it really return 100 as result for you for 5 minutes?

[Biju Raymond]

Sometimes Yes, But I feel like this is not the right way to check for High CPU Usage. Kindly help me out!

[cyber]

Why you check cpu through powershell script at all? Agent items are not enough? You can read those same perf counters also with agent, no need for any workarounds...