[plq]

When you calculate the sum of the so-called "memory consumption" of all processes, you generally end up with a number ridiculously above your the amount of physical memory installed on your box.

The only reliable way to learn the memory consumption of a process is to somehow make sure other processes don't allocate/deallocate memory, kill the process in question and watch the difference in global memory consumption.

[Yizahi]

On my windows 7 I just calculated sum for all processes and I got exactly the same number as displayed for RAM used on Performance tab.

For anyone interested to repeat it fast, run this in powershell:

Get-Process | Format-Table WorkingSet > c:\data.txt

Import contents in excel and sum all cells.