x64 Prefetch

Discussion in 'Windows Desktop Systems' started by Electronic Punk, Jul 7, 2005.

  1. Electronic Punk

    Electronic Punk Administrator Staff Member Political User Folding Team

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    Does WindowsXP x64 have the ability to prefetch?

    Registry Key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management\PrefetchParameters
    Modify/Create the Value Data Type(s) and Value Name(s) as detailed below.
    Data Type: DWORD Value // Value Name: EnablePrefetcher
    Setting for Value Data: [0 = Disabled / 1 = Application Launch Prefetch / 2 = Boot Prefetch / 3 = Prefetch All]
    Exit Registry and Reboot

    I have had setting 3 on for a while now but my prefetch folder is empty...
    Windows 2003 x64 also seems to ignore this setting (Ryan from extended64.com checked for me)
    Does the standard windows 2003 have it, is there usually any downside to not having it ?
     
  2. Perris Calderon

    Perris Calderon Moderator Staff Member Political User

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    hmmm..when I get home I'll boot into 64 and check mine
     
  3. Perris Calderon

    Perris Calderon Moderator Staff Member Political User

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    my prefetch folder is packed ep

    silly question, but are you sure you are looking at the right drive?
     
  4. Electronic Punk

    Electronic Punk Administrator Staff Member Political User Folding Team

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    yah, I only have one prefetch folder... hmm, that is the only way to disable it right? Setting the default value to 0, drive isn't an issue as I don't boot to multiple OS
     
  5. Perris Calderon

    Perris Calderon Moderator Staff Member Political User

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    you also need the task scheduler service, which should never be dissabled or set to manual

    check to see that's set, if anything but automatic, fix that
     
  6. Electronic Punk

    Electronic Punk Administrator Staff Member Political User Folding Team

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    Yeah, was disabled for some reason . Really not sure why :(
    Prefetch is working again it seems, forgotten what the advantages of it are tho!
     
  7. kcnychief

    kcnychief █▄█ ▀█▄ █ Political User Folding Team

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    Ask and ye shall receive sire, the advantages of Prefetch...

    "The Prefetch folder is used by Windows XP to speed the boot process. Windows XP records information about each program that launches at boot and uses that information to boot faster the next time. Because multiple files might have the same name, it appends a "hash" of the file's location. That's the odd string of numbers and letters between the filename and the .pf extension.

    This folder may accumulate useless junk, especially if you change your configuration a lot. There's no harm in emptying it. Simply delete all the files in that folder; Windows will rebuild it as needed."
     
  8. Perris Calderon

    Perris Calderon Moderator Staff Member Political User

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    that's a great post kcnychief except for this last paragraph.

    there's nothing in my prefetch folder over a couple of weeks old and whenever I've had the chance to check anyones prefetch, the same is so.

    if you empty the prefetch folder the os will have to redo the work.

    unless there's some kind of issue you're trying to resolve and have some reason to suspect the prefetch folder, just leave it alone
     
  9. kcnychief

    kcnychief █▄█ ▀█▄ █ Political User Folding Team

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    I agree, however that was more pointed towards the really persistent people like myself who like to have no excess files on their machine. The OS having to redo the work is minimal, and probably wouldn't be noticed anyways.

    EDIT: Also, if you refer to EP's OP, 3 is the default, which is to Prefetch All. Maybe they sync so the timestamps stay updated?