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

27 Jan 2010   #21
BunBun

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by whs View Post
Yeah, it would be nice to have more srews to turn. But then, do you want to put the extra code into the system for the 2% of users that know how to deal with that and understand the implications.
They have it in other places for less then 2% of the user base. And considering the potential benefit from such settings...

And if coded properly there would be no additional overhead when the power user settings are disabled.


My System SpecsSystem Spec
.
27 Jan 2010   #22
ikjadoon

Windows 7 Ultimate 64-bit
 
 

Actually, it's better to leave it ON for SSDs. I mean, if you read those articles.....it says it puts stuff into the RAM. Which is hella faster than any SSD I've seen.

Windows 7 knows this. It disabled defrags on my SSD, but left Superfetch on.
My System SpecsSystem Spec
27 Jan 2010   #23
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by ikjadoon View Post
Actually, it's better to leave it ON for SSDs. I mean, if you read those articles.....it says it puts stuff into the RAM. Which is hella faster than any SSD I've seen.

Windows 7 knows this. It disabled defrags on my SSD, but left Superfetch on.

Yeah, I have tried both ways and did not see any difference. If you leave it off, you have less writes to the SSD which is positive. The OCZ people (on their forum) recommend to turn it off and I asume they know why.
My System SpecsSystem Spec
.

27 Jan 2010   #24
ikjadoon

Windows 7 Ultimate 64-bit
 
 

Tony posted a guide about the tweaks he does to his SSD's over at OCZ, but he says MS says that Superfetch should be turned off for SSDs.

I like the fact that's on. Don't know why now, but just feel better, lol.
My System SpecsSystem Spec
27 Jan 2010   #25
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by ikjadoon View Post
Tony posted a guide about the tweaks he does to his SSD's over at OCZ, but he says MS says that Superfetch should be turned off for SSDs.

I like the fact that's on. Don't know why now, but just feel better, lol.
One more reason to ask the question why they do not turn it off at the Win7 installation. I noticed that too.
My System SpecsSystem Spec
28 Jan 2010   #26
ikjadoon

Windows 7 Ultimate 64-bit
 
 

Quote   Quote: Originally Posted by whs View Post
Quote   Quote: Originally Posted by ikjadoon View Post
Tony posted a guide about the tweaks he does to his SSD's over at OCZ, but he says MS says that Superfetch should be turned off for SSDs.

I like the fact that's on. Don't know why now, but just feel better, lol.
One more reason to ask the question why they do not turn it off at the Win7 installation. I noticed that too.
This is what MS says:

Quote   Quote: Originally Posted by MS
Will Superfetch be disabled on SSDs?
Quote   Quote: Originally Posted by MS

Yes, for most systems with SSDs.

If the system disk is an SSD, and the SSD performs adequately on random reads and doesn’t have glaring performance issues with random writes or flushes, then Superfetch, boot prefetching, application launch prefetching, ReadyBoost and ReadDrive will all be disabled.

Initially, we had configured all of these features to be off on all SSDs, but we encountered sizable performance regressions on some systems. In root causing those regressions, we found that some first generation SSDs had severe enough random write and flush problems that ultimately lead to disk reads being blocked for long periods of time. With Superfetch and other prefetching re-enabled, performance on key scenarios was markedly improved.
?? Are ours all just too slow, then?
My System SpecsSystem Spec
28 Jan 2010   #27
logicearth

Windows 10 Pro (x64)
 
 

If you are wanting to know the deep down core workings of SuperFetch, then the Windows Internals 5th Edition is the book you want.
My System SpecsSystem Spec
28 Jan 2010   #28
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote:
Are ours all just too slow, then
Thanks for sharing the passage. Are ours too slow? I don't think so. Mine are last generation OCZ (Vertex) and Intel (25M). If those don't qualify, what does.

Quote:
then the Windows Internals 5th Edition is the book you want.
Logicearth, could you provide a link please.
My System SpecsSystem Spec
28 Jan 2010   #29
logicearth

Windows 10 Pro (x64)
 
 

Quote   Quote: Originally Posted by whs View Post
Logicearth, could you provide a link please.
Windows Internals Book
My System SpecsSystem Spec
28 Jan 2010   #30
nate42nd

Windows 7 Professional x64
 
 

I have learned if you turn if off, it affects other services. I have an SSD in both of my main systems. I didn't notice much change, other than I could not use other services. (can't remember which ones) but I ended up turning it back on recently so I could use other services. FYI
My System SpecsSystem Spec
Reply

 Superfetch... how exactly does it work




Thread Tools




Similar help and support threads
Thread Forum
Superfetch on or off?
Iv'e just disabled mine as it was slowing the laptop down considerably, i was facing constant freezes and programs taking ages to open, switching superfetch off has sped the system considerably, ive read a few articles that advocate the use of superfetch,so i would like more info based on members...
Performance & Maintenance
Superfetch and the SSD
I constantly hear that Superfetch should be turned off when you run the OS on an SSD. I totally fail to see the point. RAM is still a lot faster than the fastest SSD and a good pack of cached stuff enhances performance. So why would anybody want to miss that opportunity. The only argument I...
General Discussion
Superfetch
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
Superfetch?
My Windows 7 keeps switching from Aero theme to the regular theme. Every time it switches from Aero to regular, it says Superfetch stopped working. Any clues what could be bothering Superfetch? D:
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 15:03.
Twitter Facebook Google+ Seven Forums iOS App Seven Forums Android App