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Windows 7: Pagefile.sys

09 Feb 2010   #81
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Quote   Quote: Originally Posted by BunBun View Post
The way I understand it is physical memory is actual stored memory (RAM, pagefile, whatever) and virtual memory is just what the application sees. What happens to it after that is up to the OS and VMM.
From the definition here:

Physical memory Definition from PC Magazine Encyclopedia

It seems that the pagefile cannot be included in the term physical memory.

Looking further, I came across another page that tosses in items which didn't come to mind:

Computer Memory Definition - System Ram - CPU Cache - Dram Memory

Whether L1, L2 and CPU Registers would fall with the definition of physical memory, I don't know.

EDIT: I guess that ReadyBoost might also be included in the terminology.


My System SpecsSystem Spec
.
09 Feb 2010   #82
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Quote   Quote: Originally Posted by hubris View Post
Quote   Quote: Originally Posted by seekermeister View Post
I'm not certain what the point was in the post with the attachments, but the only thing that I might question is the placement of the pagefile...being at the end of the drive, where the access time is longest. Since the pagefile is already slow by nature, I don't see any point in adding to that trait.
you could have just done me a favour by pointing out i should move page to start of drive on the second hd . ?
In my own fashion, that is what I did.

EDIT: If the first partition of the second drive is for an OS, or may be in the future, I would put the pagefile immediately after it, rather than in front.
My System SpecsSystem Spec
09 Feb 2010   #83
BunBun

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by seekermeister View Post
Quote   Quote: Originally Posted by BunBun View Post
The way I understand it is physical memory is actual stored memory (RAM, pagefile, whatever) and virtual memory is just what the application sees. What happens to it after that is up to the OS and VMM.
From the definition here:

Physical memory Definition from PC Magazine Encyclopedia

It seems that the pagefile cannot be included in the term physical memory.

Looking further, I came across another page that tosses in items which didn't come to mind:

Computer Memory Definition - System Ram - CPU Cache - Dram Memory

Whether L1, L2 and CPU Registers would fall with the definition of physical memory, I don't know.

EDIT: I guess that ReadyBoost might also be included in the terminology.
CPU cache is memory on die so yes it would be physical but it is outside of the scope of virtual memory. I don't beleive VMM has any handle on what is stored in the CPU cache. Correct me if I am wrong.
My System SpecsSystem Spec
.

09 Feb 2010   #84
hubris

W7, Xp Pro
 
 

Quote:
EDIT: If the first partition of the second drive is for an OS, or may be in the future, I would put the pagefile immediately after it, rather than in front.
Other OS ?, that's for later, thanks for that.

Hmmmm...PCLinuxOS...
My System SpecsSystem Spec
09 Feb 2010   #85
seekermeister

W7x64 Pro, SuSe 12.1/** W7 x64 Pro, XP MCE
 
 

Quote   Quote: Originally Posted by BunBun View Post
Quote   Quote: Originally Posted by seekermeister View Post
Quote   Quote: Originally Posted by BunBun View Post
The way I understand it is physical memory is actual stored memory (RAM, pagefile, whatever) and virtual memory is just what the application sees. What happens to it after that is up to the OS and VMM.
From the definition here:

Physical memory Definition from PC Magazine Encyclopedia

It seems that the pagefile cannot be included in the term physical memory.

Looking further, I came across another page that tosses in items which didn't come to mind:

Computer Memory Definition - System Ram - CPU Cache - Dram Memory

Whether L1, L2 and CPU Registers would fall with the definition of physical memory, I don't know.

EDIT: I guess that ReadyBoost might also be included in the terminology.
CPU cache is memory on die so yes it would be physical but it is outside of the scope of virtual memory. I don't beleive VMM has any handle on what is stored in the CPU cache. Correct me if I am wrong.
I was speaking of whether they would be termed physical memory, not virtual memory, but something on the same page seem to preclude that:

Quote:
Cache

This form of memory can be considered as an intermediary between the main physical RAM and the CPU. The cache makes any data frequently used by CPU instantly available. If the required information is not located in the cache, a fetch is made from the main memory.
They seem to differentiate between physical memory on those of the CPU.
My System SpecsSystem Spec
09 Feb 2010   #86
BunBun

Windows 7 Ultimate x64
 
 

I was just clarifying.

I think its best to think of it as cache only and not physical memory.
My System SpecsSystem Spec
09 Aug 2011   #87
Calabrache

Windows 7 x64 Ultimate
 
 

Small question with Win7 x64, 8go Ram, what would be most suited
a) leave win7 set the pagefile automatically
b) set it manually to the recommended size (about 12go)
c) set it to the equivalent amount of RAM
Thanks
My System SpecsSystem Spec
09 Aug 2011   #88
pallesenw

Windows
 
 

Quote   Quote: Originally Posted by BunBun View Post
1. Disabling the pagefile does not disable virtual memory.
This is an elderly disussion, but this is the correct answer. In this context, the page file has nothing to do with virtual memory (other than being used by the memory manager as a temporary storage).
My System SpecsSystem Spec
09 Aug 2011   #89
smarteyeball

 
 

Quote   Quote: Originally Posted by Calabrache View Post
Small question with Win7 x64, 8go Ram, what would be most suited
a) leave win7 set the pagefile automatically

That one. 7 manages virtual memory very well, so it's best to leave it.

Disable=bad
Manual Double Ram=Unnecessary since XP
My System SpecsSystem Spec
10 Aug 2011   #90
medeiom

Windows 7
 
 

Well the truth of this matter falls into two different categories...

1. If you have an SSD with 8GB of Ram, disable the pagefile. By having a pagefile on an SSD will wear it down over time and this is a fact. So this relates to me and I have it disabled with no issues whatsoever. I have a second traditional hard drive on my ThinkPad within a drive adapter and have virtual memory set to that. This works perfectly!

2. If you have a a traditional hard drive with 8GB of memory, I would disable it. Why? Because before I bought my SSD, I was running Virtual machines with no pagefile and running other programs which did not take up more than 4.5GB of RAM with no issues at all.

However, everyone's case is different so test out yourself and narrow it down to possibilities. Remember, if you have 8GB of Ram and disable pagefile, you are literally freeing up 8GB of space on your hard drive. If you are a serious gamer and run other programs, I recommend using the Win7 monitoring program just to see how much Ram is being taken up. If you're not going over the 5GB or 6GB or Ram, disable pagefile. Windows 7 and Vista does a much better job than XP without pagefile with 8GB or more of Ram.
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