PowerShell - how can I get memory consumption peak for my exe program from PowerShell

Question

I have a program which allocates memory. I am running it from Windows PowerShell command line. It can run for 1-2 hours allocating and releasing memory blocks.

What I am looking for is a way to get at the end (when the program finishes) some memory consumption statistics. More specifically, what was the peak usage of the memory (max memory allocated).

Answer 1

Get-Process -Id xxx gives you the Process object instance of the process with ID xxx. There are all kinds of memory-related properties in there, including things like PeakVirtualMemorySize64 and PeakWorkingSet64. Pick the ones you find useful.

You can even set up a background job to get a data series, something like

$proc = Start-Process "your_long_running.exe" -PassThru

$memoryWatcher = Start-Job -ScriptBlock {
    while ($true) {
        Get-Process -Id $args[0] | Select VirtualMemorySize64,PeakVirtualMemorySize64
        Start-Sleep -Seconds 1
    }
} -ArgumentList $proc.Id

# now wait for the process to end
Wait-Process -Id $proc.Id
    
$memoryWatcher.StopJob()
$results = Receive-Job $memoryWatcher

$results | Format-Table