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Windows 7: Task manager is lying

06 Apr 2011   #1
blackdot

desktop: win7 professional x86, laptop: win7 prof. x64
 
 
Task manager is lying

I have 2 gigs of ram, the taskmangager tells me that I am using 45% of it, and confirmes that under 'performance', where it states that 916mb are in use for memory.

But if I sum up all the memory usage under 'processes' i come to about 450mb. What is using the remaining 450mb's ?


My System SpecsSystem Spec
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06 Apr 2011   #2
severedsolo

Windows 7 Ultimate X64 SP1
 
 

Hi blackdot, have you clicked "Show Processes for All Users" under Task Manager?
My System SpecsSystem Spec
06 Apr 2011   #3
Mike Connor

Several, including Windows 7 x64 Ultimate
 
 

Computers generally and software as well, are completely incapable of "lying".

It is not always a good idea to believe everything you see on a screen, because the software shows what it is programmed to show, and that does not necessarily reflect reality.

In order to "lie" you have to know the truth. Machines don't know anything at all.

Summing up various things often results in considerable discrepancies. This can be due to many things. Various units, like GBytes, incorrect interpretation or display of those units, etc etc.

If you want very accurate analysis of various things, then you need accurate tools and the wherewithal to use them.

Regards....Mike Connor
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06 Apr 2011   #4
blackdot

desktop: win7 professional x86, laptop: win7 prof. x64
 
 

Quote   Quote: Originally Posted by severedsolo View Post
Hi blackdot, have you clicked "Show Processes for All Users" under Task Manager?
yes I have.

I've uploaded an image to show my situation:[


Attached Thumbnails
-untitled4.png  
My System SpecsSystem Spec
06 Apr 2011   #5
Brink
Microsoft MVP

64-bit Windows 10 Pro
 
 

Hello Blackdot,

Looking in the Memory tab in Resource Monitor can help ID what is using your memory a bit better. It's most likely memory that has been filled by superfetch and just has not been released yet as needed.

-resoruce_monitor.jpg

Hope this helps,
Shawn


My System SpecsSystem Spec
06 Apr 2011   #6
logicearth

Windows 10 Pro (x64)
 
 

Not everything that consumes memory is a process. Furthermore, the values Task Manager show does not have a 1 to 1 relation to how much physical memory a process is taking. Most of the time the memory reserved or used by a process is virtual memory.
My System SpecsSystem Spec
07 Apr 2011   #7
cluberti

Windows 10 Pro x64
 
 

Agreed - task manager is just that, a task manager. Using it to determine accurate values for CPU time, memory (RAM) usage, etc is fraught with peril at best. Using Resource Monitor (resmon.exe) when you want to see what resources your system is using is a much better alternative, and the best one that is installed with Windows by default. Process Explorer from sysinternals is better at more things than ResMon is, but that's a separate download (and has a slight learning curve, which ResMon does not).
My System SpecsSystem Spec
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 Task manager is lying




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