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


25 Jan 2010   #1

Windows 7 Ultimate X64 SP1
 
 
Superfetch... how exactly does it work

Just a little knowledge building here, i understand that superfetch loads applications most used into the memory for easier access, but i read an article explaining it, and it seemed to contradict itself, it said that it optiises boot times, but doesnt start fetching until the CPU is idling after boot, can someone please explain to me how both are possible?

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25 Jan 2010   #2

Windows 7 Ultimate Signature Edition
 
 

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25 Jan 2010   #3

Windows 7 Pro X64
 
 

In other words, is it essential to use it and can it be turned off, it can save a fair bit of CPU power apparently.

Thanks
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25 Jan 2010   #4

Windows 7 Ultimate Signature Edition
 
 

for best performance it is recommended to leave it running. however many people turn it off and nothing bad happens.
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25 Jan 2010   #5

Windows 7 Pro X64
 
 

Quote   Quote: Originally Posted by dannyboy2005 View Post
In other words, is it essential to use it and can it be turned off, it can save a fair bit of CPU power apparently.

Thanks
My bad, after some forum reading and some conclusions, it is pretty much essential to keep it turned on if you want to keep your O/S running smooth and fast!

I'll leave my turned on!
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25 Jan 2010   #6

Windows 7 Ultimate X64 SP1
 
 

interesting valton, but doesnt answer my question, if it doesnt start fetching until the cpu reaches idle, how does it optimise boot? or is it simply in the way that it arranges the boot files on the HDD?
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25 Jan 2010   #7

Windows 7 Ultimate Signature Edition
 
 

well idk i didn't read the white paper article on it, i just pointed you in the right direction. but if it doesn't start up until the cpu comes to idle then i'd say it doesn't help boot times out much. but according to the above poster disabling it can cause system instability so thats something to think about before messing with it. personally i don't see a reason to turn it off myself and like i've said many times on these forums if it ain't broke don't fix it.
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25 Jan 2010   #8

Windows 7 Ultimate X64 SP1
 
 

oh i have no intention of switching it off, i was just curious about the boot thing, never mind, ill keep on wondering, thanks for the article though, interesting read
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25 Jan 2010   #9

Windows 7 Ultimate Signature Edition
 
 

sorry i couldn't be more helpful, i've just never worried enough to check into it.
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25 Jan 2010   #10
whs
Microsoft MVP

Vista, Windows7, Mint Mate, Zorin, Windows 8
 
 

Quote   Quote: Originally Posted by dannyboy2005 View Post
In other words, is it essential to use it and can it be turned off, it can save a fair bit of CPU power apparently.

Thanks
You do that if your OS runs off an SSD. But for a HDD it is improving performance. Turning it off is counterproductive.
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 Superfetch... how exactly does it work




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