Windows 10: Disable Prefetch & Superfetch

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  1. Posts : 156
    Windows 10 Enterprise x64 1709
    Thread Starter
       12 Dec 2017 #51

    I've got plenty of RAM, do I really need to use RamDisk, of course it's even faster than Samsung 960 Pro but is there any noticeable difference in using them? And what's the best RAMDisk App?
      My ComputerSystem Spec

  2.    12 Dec 2017 #52

    cereberus said: View Post
    Using a RAM disk just decreases RAM available for use, increasing paging unless user has plenty of RAM. When will people stop perpetuating stuff about writing life issues with SSDS. Things have moved on.
    Some programs still insist on using disk based cache (or temporary work space) so a RAMdisk just fools it by using RAM instead.
      My ComputersSystem Spec

  3.    12 Dec 2017 #53

    CountMike said: View Post
    Some programs still insist on using disk based cache (or temporary work space) so a RAMdisk just fools it by using RAM instead.
    We are goung away from point of using it for prefetch which is pointless as you need the prefetch in permanent storage anyway to get it on RAMDISK.

    I cannot remember any program that used disk caching for a long time. Even if they did, I seriously doubt you would detect any real gain if you used an ssd as such programs were designed in days of spinners.
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  4.    12 Dec 2017 #54

    A RAMDisk was a useful thing back in DOS days but are now largely obsolete. Modern operating systems have a sophisticated caching system that provides most of the benefits with fewer disadvantages. The cache is transparent to applications and all that access a disk will benefit. For practical purposes the system cache is a super RAMDisk. It's size is dynamically adjusted according to usage and RAM availability. What files are in the cache and how long they remain there is dynamically adjusted according to the situation. And the caching is more granular, containing the portions of files that are being used while a RAMDisk must contain entire files.

    A RAMDisk is usually a poor use of memory. It ties up substantial portions of memory that can usually be managed more efficiently by the OS. If you really understand your workload you may be able to do better. But the odds are against it. You may enhance some aspect of performance but overall performance will usually suffer.

    In a modern OS almost all of RAM is essentially used as a form of cache. This goes far beyond the system cache. This memory isn't normally considered a cache but in a very real sense that is how it is used.
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  5. Posts : 1,648
    W7 Ultimate SP1 (64 bit), LM 18.3 MATE (64 bit), W10 Home (64 bit)
       12 Dec 2017 #55

    The best use of a RAMDisk is when you are multi-booting a 32 bit OS & a 64 Bit OS.

    My previous setup was triple boot (XP, W7 & LM).
    XP couldn't use the 8 GB of RAM that was installed, so I setup a 4 GB RAMDisk.
    After that XP ran very smoothly.

    The fact that all of the garbage in the Temp folders and caches was purged on shutdown was a bonus.
      My ComputerSystem Spec

  6.    12 Dec 2017 #56

    Hi,

    If you know what you're doing a RAM disk can be useful for sure. RAM cerainly is still much faster than any traditional non-volatile storage media.

    Cheers,
      My ComputersSystem Spec


  7. Posts : 270
    Windows 10
       13 Dec 2017 #57

    I'm with Cliff S ... and many others here ... and many more at MS. Leave this stuff alone.

    MS develops OS after OS after OS, refining it over the decades. Leave it alone.

    But then comes Joe Computer Homeboy.
    Joe Computer Homeboy knows better.
    Ugh!
    Must disable prefetch.
    Must disable superfetch.
    Must regap spark plugs.
    Must remove catalytic converter.
    Ugh!
      My ComputerSystem Spec

  8.    13 Dec 2017 #58

    When I try to disable services I always end up with a sluggish performance and I end up setting everything as default. So if you can, leave everything as default
      My ComputerSystem Spec

  9.    13 Dec 2017 #59

    margrave55 said: View Post
    I'm with Cliff S ... and many others here ... and many more at MS. Leave this stuff alone.

    MS develops OS after OS after OS, refining it over the decades. Leave it alone.

    But then comes Joe Computer Homeboy.
    Joe Computer Homeboy knows better.
    Ugh!
    Must disable prefetch.
    Must disable superfetch.
    Must regap spark plugs.
    Must remove catalytic converter.
    Ugh!
    I disabled prefetch, defender, cortana, windows update services, various services, installed several "anti-spyware apps", removed MS Store and UWP apps, disabled a lot of ports in firewall, disabled Edge, set pagefile to a fixed size etc.

    My PC runs 2% faster now and I have save 2GB on my 2TB drive but chrome keeps crashing - what's wrong .
      My ComputerSystem Spec

  10.    13 Dec 2017 #60

    cereberus said: View Post
    I disabled prefetch, defender, cortana, windows update services, various services, installed several "anti-spyware apps", removed MS Store and UWP apps, disabled a lot of ports in firewall, disabled Edge, set pagefile to a fixed size etc.

    My PC runs 2% faster now and I have save 2GB on my 2TB drive but chrome keeps crashing - what's wrong .
    It's Mirosoft's fault, they put all that stuff in just to annoy YOU !!!
      My ComputersSystem Spec


 
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