How to get current free physical memory ?

[Peter Stojkovic]

Using VS 2003 and Windows XP

How can I get free physical memory ??

Where is a full documentation for WMI and so an managementobjects ?


Peter

 

[Peter Stojkovic]

TOP A:
To get FreePhysicalMemory
via
"Select FreePhysicalMemory from win32_operatingsystem"

we need 600ms .
That's a long time.


TOP B:
A full select
"Select * from win32_operatingsystem"
needs 10 seconds !!!!!




Is there any quicker/other possibility to get amount of free memory ??


Peter

 

[Crouchie1998]

Add reference to 'System.Management' DLL

Add the following Import statement

Imports System.Management

Add this function:

Private Function GetFreePhysicalMemory() As String
Dim objMgmt As ManagementObject
Dim objOs As ManagementObjectSearcher = _
New ManagementObjectSearcher("SELECT * FROM Win32_OperatingSystem")
Dim strResult As String
For Each objMgmt In objOs.Get
strResult = objMgmt("freephysicalmemory").ToString()
Next
objOs.Dispose()
objMgmt.Dispose()
Return strResult
End Function

Usage:

MessageBox.Show(GetFreePhysicalMemory)

I hope this helps

Crouchie1998
BA (HONS) MCP MCSE

 

[Peter Stojkovic]

Thanks,

but this needs so much time to execute as described in my last mail !

Peter

 

[Herfried K. Wagner [MVP]]

Using VS 2003 and Windows XP

How can I get free physical memory ??

<URL:http://dotnet.mvps.org/dotnet/samples/operatingsystem/MemoryStatus.zip>

 

[Peter Stojkovic]

Thanks a lot.

That is much qicker than,
"SELECT * from win32_...."

Peter

 

[Herfried K. Wagner [MVP]]

That is much qicker than,
"SELECT * from win32_...."

WMI was primarily designed to to /management/ operations easily, so
performance was not that important. In addition to my previous reply, you
may want to take a look at the 'MemoryStatusEx' function, which is more
evolved than the 'MemoryStatus' function I use in the sample.