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Pagefile.sys, what is it?

This is a discussion on Pagefile.sys, what is it? within the Windows 7 , Windows Vista Support forums, part of the Tech Support Forum category. Hey, I was just wondering what the file "pagefile.sys" is. It currently takes up 3.3GB of my hard drive space


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Old 06-12-2009, 08:25 AM   #1
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Hey,
I was just wondering what the file "pagefile.sys" is. It currently takes up 3.3GB of my hard drive space . Is it any important?
I have 3GB of RAM and I am operating on Vista Home Premium 32bit.
Thanks in advance.
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Old 06-12-2009, 08:50 AM   #2
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It is a swap file used by the OS, so don't mess with it. Some applications will not run if there is no page file.
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Old 06-12-2009, 03:43 PM   #3
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Windows uses virtual memory to store stuff. The Windows Memory Manager translates between virtual memory and physical memory (RAM).

Virtual memory can be anywhere that memory is stored on your computer, but the most common place for it is on the pagefile. That's kept in the pagefile.sys file in the root of your system drive (C:\ for most systems).

In addition to some applications requiring a pagefile, you also need a pagefile to capture information if the system crashes (aka the Blue Screen of Death). And, the pagefile has to be slightly larger than the size of your RAM in order to do this.
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Old 06-13-2009, 01:51 PM   #4
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Cool thanks, I'm kinda new to this stuff :)
I guess I shouldn't mess with that file then :D
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Old 06-13-2009, 01:52 PM   #5
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No i would just leave it alone.
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Old 06-14-2009, 04:02 AM   #6
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Agreed - leave the page file alone.

To check on the page file, download the attached zip file and extract the EXE file. RIGHT-click on the exe file and select "Run as Admin". A notepad will open w/ the output.

Regards. . .

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File Type: zip WMI_recoveros_pagefile_jcgriff2_com_.zip (20.4 KB, 41 views)
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