W2KSG: WMI Total Physical Memory

I have decided to jump to the WMI section.  The VBScript dictionary object is equivalent (ish) to the PowerShell hash table which has been covered in many places.  Chapter 5 is on ADSI and having just finished writing a big chapter on that for my book I wanted to look at something else.

Chapter 6 in the scripting guide covers WMI.  PowerShell has great WMI support so if we look at

Script Center Home > Microsoft Windows 2000 Scripting Guide > Scripting Concepts and Technologies for System Administration > WMI Scripting Primer  WMI Overview

Listing 6.1 shows us how to get the Total Physical Memory on a machine (10 lines of VBScript)

The listing uses the Win32_LogicalMemoryConfiguration class so we turn the script into

Get-WmiObject -Class Win32_LogicalMemoryConfiguration | Select TotalPhysicalMemory

However, XP and later don’t support this so we use

Get-WmiObject -Class Win32_OperatingSystem | Select TotalVisibleMemorySize

This is one area where research pays off as WMI is evolving and changing with each version of Windows


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