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Windows 7: RAM Usage

02 Nov 2009   #11
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

You are looking in the wrong places. Look into task manager > performance tab and see how much physical memory is free - probably very little. It's all used for caching. If you pump up your RAM with programs, you will see a considerable performance degradation. You could easily try that out by installing a virtual partition (e.g. with vBox) to which you allocate half of your RAM.


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02 Nov 2009   #12
Frostmourne

Windows 7 Ultimate x86-64
 
 

Use Process Monitor for more info too.
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03 Nov 2009   #13
ashley

 
 

You can check which process is using more memory from task manager and then you can solve your problem.
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03 Nov 2009   #14
sup3rsprt

XP, Seven, 2008R2
 
 

Quote   Quote: Originally Posted by ashley View Post
You can check which process is using more memory from task manager and then you can solve your problem.
ashley,

That's the thing, there is no problem. The original poster wants to use more memory on purpose, not less.
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03 Nov 2009   #15
Grinch80

Windows 7 Pro (64-bit)
 
 

Quote   Quote: Originally Posted by Teerex View Post
Everyone's Windows 7 uses approx. 80-90% of available physical memory, provided that everyone didn't tweak their Superfetch service off.

You can see that in Resource Monitor, the Memory tab. There's a nice graph there.
Teerex - curious about your comment since I did turn superfetch off (actually set to boot only aka reg "2") because it was thrashing my drive. I'm at a nice 25% allocation of physical ram, which is what I would expect with 4 gb. That is, expect from XP, but I'm a noob with 7. Thoughts about the value of superfetch relative to constant thrashing?
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04 Nov 2009   #16
H2SO4

Win7x64
 
 

Quote   Quote: Originally Posted by Grinch80 View Post
Quote   Quote: Originally Posted by Teerex View Post
Everyone's Windows 7 uses approx. 80-90% of available physical memory, provided that everyone didn't tweak their Superfetch service off.

You can see that in Resource Monitor, the Memory tab. There's a nice graph there.
Teerex - curious about your comment since I did turn superfetch off (actually set to boot only aka reg "2") because it was thrashing my drive. I'm at a nice 25% allocation of physical ram, which is what I would expect with 4 gb. That is, expect from XP, but I'm a noob with 7. Thoughts about the value of superfetch relative to constant thrashing?
Superfetch is a good thing. Without it, your overall experience will be somewhat slower because the RAM will be less efficiently utilised. Therefore, disabling superfetch is a bad thing.

"Constant thrashing" sounds abnormal. If you use a 3rd-party disk defragger, it's possible that the "thrashing" is caused by the defragger's mangling of the on-disk layout (it's not prefetch-aware, so it lays out the file fragments in a way which may look pretty, but is in fact slower). That's a guess of course, and you might want to investigate the thrashing rather than disable superfetch.
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04 Nov 2009   #17
Grinch80

Windows 7 Pro (64-bit)
 
 

Quote   Quote: Originally Posted by H2SO4 View Post
"Constant thrashing" sounds abnormal. If you use a 3rd-party disk defragger, it's possible that the "thrashing" is caused by the defragger's mangling of the on-disk layout (it's not prefetch-aware, so it lays out the file fragments in a way which may look pretty, but is in fact slower). That's a guess of course, and you might want to investigate the thrashing rather than disable superfetch.
Ahh, yes, I've been using Defraggler. So is the recommended course to enable Superfetch and use 7's built in defrag tool? I assume this tool is Superfetch aware? I do know that once Superfetch was disabled, my thrashing stopped. But maybe I put myself in this situation by using Defraggler which made Superfetch work all the more harder to fix things Defraggler might have messed up.
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04 Nov 2009   #18
H2SO4

Win7x64
 
 

Quote   Quote: Originally Posted by Grinch80 View Post
Ahh, yes, I've been using Defraggler. So is the recommended course to enable Superfetch and use 7's built in defrag tool?
It's definitely recommended to leave Superfetch enabled. There wouldn't be any "official" MS recommendations regarding 3rd-party defragmenters, but it's a bad idea to use one which interferes with prefetch optimisation. Some background info is in this post:

Windows 7 defrag vs Diskeeper

Quote   Quote: Originally Posted by Grinch80 View Post
I assume this tool is Superfetch aware?
The built-in defragger? It's prefetch aware, and that in turn helps Superfetch for reasons that will become more obvious based on the info in the linked post.

Short version: the in-built defragger organises files according to prefetch heuristics, and that layout may look very, very strange to a non-prefetch-aware 3rd-party defragger which has its own definition of "good layout". The 3rd-party defragger may destroy the prefetch-optimised layout, thus making it more painful and slow for superfetch to page that content into RAM.

Quote   Quote: Originally Posted by Grinch80 View Post
I do know that once Superfetch was disabled, my thrashing stopped. But maybe I put myself in this situation by using Defraggler which made Superfetch work all the more harder to fix things Defraggler might have messed up.
The "thrashing" certainly sounds excessive. My guess that it might be linked to the use of a 3rd-party defragger is just that - a guess. If you let the in-built defragger do its thing instead of "defraggler", and that still doesn't help mitigate the disk activity, you may wish to consider starting your own thread on the topic of "excessive disk utilisation when Superfetch is enabled", or something along those lines.
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04 Nov 2009   #19
Grinch80

Windows 7 Pro (64-bit)
 
 

H2SO4 - great info, many thanks.
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04 Jan 2010   #20
marseverywhere

Triple boot XP 64bit, Windows 7 Ultimate 64bit, Ubuntu 9.04 64bit
 
 

First post here. I can not figure out how to start a new thread, so I am piggy backing on here. Would someone, please, point me in the right direction.

My situation is that I run windows 7 64bit on a 32GB RAM, 3.0 GHz Xeon quad-core machine with RAID 0, striped, 10,000 RPM drives. I thought 64bit OSs were capable of using "lots" of RAM. I have tried to push things by running two dozen you tube videos, a WMP video and AVG full scan at max speed all running at once and the max RAM usage I get is 12% compared to RAM usage of 8% - 10% (depending on how long my machine has been on) with no apps open. What gives????????????
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