使用Get-WmiObject使用示例监视CPU

Question

出于安全要求，我使用Get-WmiObject cmdlet来监控未安装PowerShell的服务器的平均CPU使用率。

$CPU = Get-WmiObject Win32_Processor -computername $computerName  | Measure-Object -property LoadPercentage -Average | Select Average


$CPULoad = $($CPU.average)                                   

if ( $CPULoad -ge $ThresholdCPU ){                                          

Write-output "High CPU usage: $CPULoad % on $computerName" 

} 
Else {

Write-output "CPU usage on $computerName is normal: $CPULoad %" 

}

当当前CPU使用率高于手动设置的CPU阈值iv'e时，我的脚本工作正常。

但是，由于远程服务器中的CPU使用率激增，我面临着许多错误警报。

在阅读了cmdlet的文档后，我发现与Get-Counter cmdlet相反，Get-WmiObject没有某种SampleInterval属性。

有没有办法使用Get-WmiObject来实现这一点，所以if标准只有在3个有效样本之后才为真？

Answer 1

也许使用固定次数的循环可以达到您想要的效果：

$maxAttempts = 3                                
for ($attempt = 0; $attempt -lt $maxAttempts; $attempt++) {
    $CPULoad = (Get-WmiObject Win32_Processor -ComputerName $computerName  | 
                Measure-Object -property LoadPercentage -Average).Average
    if ( $CPULoad -le $ThresholdCPU ) { break }
    # do nothing for x seconds and test CPU load again
    Start-Sleep -Seconds 1
}

if ($attempt -lt $maxAttempts) {
    Write-output "CPU usage on $computerName is normal: $CPULoad %" 
}
else {
    Write-output "High CPU usage: $CPULoad % on $computerName" 
}