Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: Superfetch... how exactly does it work

30 Jan 2010   #41

Windows 7 Ultimate x64

Quote   Quote: Originally Posted by logicearth View Post
Quote   Quote: Originally Posted by BunBun View Post
You are right about using lots of different software, superfetch impedes that as while you are running that software superfetch is still cacheing stuff from the HDD slowing down it's access and saturating the south bridge chip subsystem while you are trying to work.
No, it does not impede that in anyway. SuperFetch only works while the I/O for the system is free. It will not saturate or slow down your system while you are working.

Instead of making assumption, wrong assumptions please read Windows Internals 5th Edition.
Yes cause I want to bore myself with that reading... and you should take a step back before you accuse someone of assumptions, you don't know my background or what I do.

I don't care what that book says. I have done my own testing and with superfetch on while gaming (world of warcraft for example), and while doing CAD work; my HD was constantly being accessed saturating the SB system and taking resources away from things like my network card which in turn increased my lag in games and decreased overall performance.

I tested this quite extensively when i switched to vista and was happy that I could disable it.

I have not, however, tested this with windows 7. At any rate most newer HD's are fast enough that if you keep your system somewhat maintained load times are not really a problem. Which is all superfetch helps. And if your boot times are slow then just use S3 standby.

Quote   Quote: Originally Posted by logicearth View Post
Quote   Quote: Originally Posted by djmauro View Post
But cache still uses up the RAM storage capacity... so it should count as a usage, it still fills up RAM.

I guess the superfetch related massive ram usage is a bug of the specific version.
RAM you are not using. RAM not in use is being wasted, hence SuperFetch uses it so not to waste it. But as soon as an application requires space in use by SuperFetch, the space is overwritten not paged out. Zero overhead.
wasting resources loading that RAM doesn't seem to be much better...

EDIT: Boot times and application loading is still faster in XP (ironically enough even through a VT window in windows 7...).

My System SpecsSystem Spec

 Superfetch... how exactly does it work

Thread Tools

Similar help and support threads
Thread Forum
Hello! I have alwsays been getting fast and decent replies here so Im starting a new thread (I hope this is the right place to start it) :P This might be to much text for you guys but please read the two headlines atleast (and sorry for my bad english). My problem is that I cant get...
Performance & Maintenance
To superfetch or not?
Hi... new here and have learned lots and lots! I have a new computer (Mar 2011) and after reading everything here about installing the SP1, I bit the bullet. Everything went smoothly. The next day I noticed my boot time went from 45 sec to 95. From posts here, I waited 5 days to see if things...
Performance & Maintenance
Superfetch doesn't work
Please help. I was installing a Buffalo External Ministation harddrive on to my Dell Inspiron 1545 Laptop and now the laptop doesn't work properly. It is super-slow. I ran a diagnostic check and it appears to be the superfetch which is not working. I tried updating windows to no avail. I contacted...
General Discussion
Is there a way to make superfetch only "fetch" applications and not the entire movie I watched the other day?
Performance & Maintenance
Have they changed its code in some fundamental way? I always used to have to disable it eventually on vista as it was very greedy with ram, quite frequently leaving me with very little head room. But, on W7 it seems incredibly well behaved. It's almost as if is not enabled.
General Discussion

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 13:30.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App