Get Memory usage and top processes.

Get-MemoryUsage.ps1

## The idea and most of the code comes from. https://www.petri.com/display-memory-usage-powershell

Function show-MemoryUsage
{
    [cmdletbinding()]
    Param()
 
    $os = Get-Ciminstance Win32_OperatingSystem
    $pctFree = [math]::Round(($os.FreePhysicalMemory / $os.TotalVisibleMemorySize) * 100, 2)
 
    if ($pctFree -ge 45)
    {
        $Status = "OK"
    }
    elseif ($pctFree -ge 15 )
    {
        $Status = "Warning"
    }
    else
    {
        $Status = "Critical"
    }
 
    $data = $os | Select @{Name = "Status"; Expression = {$Status}},
    @{Name = "PctFree"; Expression = {$pctFree}},
    @{Name = "FreeGB"; Expression = {[math]::Round($_.FreePhysicalMemory / 1mb, 2)}},
    @{Name = "TotalGB"; Expression = {[int]($_.TotalVisibleMemorySize / 1mb)}}

    $data2 = get-wmiobject WIN32_PROCESS | Sort-Object -Property ws -Descending|select -first 5|Select processname, @{Name = "Mem Usage(MB)"; Expression = {[math]::round($_.ws / 1mb)}}, @{Name = "ProcessID"; Expression = {[String]$_.ProcessID}} 

    $dataString = $data |Format-Table -AutoSize | Out-String
    $data2string = $data2 |Format-Table -AutoSize| Out-String
    $dataString

    $data2string
}