Total physical & virtual memory utilized by a process tree.

Question

Is there a way in process explorer (or some other interactive tool) to get the total physical and virtual memory used by some process tree?

I have a windows 11 laptop with 16GB of memory and 11GB of it is being used by windows after it has booted and without any apps running (I have disabled all my startup apps including sysmain.

Being able to easily explore the process trees and get memory sizes at any level in the heirarchy would be very useful but I did not see any columns which provide this information. Am I missing something

Answer 1

How do I install the latest version of poolmon on windows 11?

Answer 2

Hello，
The version of PoolMon is included in the \Tools\Other subdirectory of the Windows Driver Kit (WDK).
https://learn.microsoft.com/en-us/windows-hardware/drivers/download-the-wdk

Answer 3

This Powershell function can sum the private bytes of all processes in a tree:

function GetTreeMemoryUsage($root, $procs = $null, $level = 0) {
    if ($procs -eq $null) {
        $procs = Get-Process | % {
            @{
                Id = $_.Id;
                ParentId = $_.Parent.Id;
                Name = $_.Name;
                PrivateMemorySize64 = $_.PrivateMemorySize64
            }
        }
    }

    Write-Host -NoNewline "$("   " * $level)|-- $($root.Name)"
    Write-Host -ForegroundColor DarkGray " (PID $($root.Id); $($root.PrivateMemorySize64 / 1MB) MB)"

    $children = $procs | ? { $_.ParentId -eq $root.Id }
    
    $totalMemory = $root.PrivateMemorySize64
    $totalMemory += ($children | % { GetTreeMemory $_ $procs ($level + 1) } | measure -Sum).Sum

    return $totalMemory
}

You can use it like this:

(GetTreeMemoryUsage (Get-Process "devenv")) / 1GB