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  1.    13 Jun 2016 #1
    Join Date : Jun 2015
    UK
    Posts : 2,076
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)

    Put pagefile.sys on SSD or HDD & System Restore Size?


    I'm trying to clean up my SSD system disk after upgrading to Windows 10. I have a SSD and several hard drives in my desktop PC plus 16GB RAM. Do I need a page file at all and if I do, how big should it be and on which drive should it be located for best performance?

    Also, how much disk space (in GB) should be devoted to System Restore on my SSD system disk?
      My ComputersSystem Spec
  2.    13 Jun 2016 #2
    Join Date : Apr 2014
    Space coast of Florida
    Posts : 5,339
    Windows 10 Pro X64 16299.19

    Put it on the SSD and let the system manage it. You want the page file on the fastest disk to take advantage of the speed.

    I like to keep System Restore to 10 to 15GB. I currently have 3 restore points available. 5/22, 6/5 and 6/11. That, along with weekly image backups using Macrium plus mirroring important files and folders every 4 hours give me all the protection and recovery I need.
      My ComputersSystem Spec
  3.    13 Jun 2016 #3
    Join Date : Jun 2015
    UK
    Posts : 2,076
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)
    Thread Starter

    Thanks. What utility do you use to mirror files/folders?
      My ComputersSystem Spec
  4.    13 Jun 2016 #4

    I have the same amount of ram you do and I've disabled it completely. pagefile was conceived at a time when PCs weren't powerful and couldn't hold much memory. They wouldn't have believed what we have today.

    I haven't noticed any downsides.
      My ComputersSystem Spec
  5.    13 Jun 2016 #5
    Join Date : Jun 2015
    UK
    Posts : 2,076
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)
    Thread Starter

    Why then does Windows 10 assign a 3GB page file to my SSD when the OS knows I have 16GB RAM?
      My ComputersSystem Spec
  6.    13 Jun 2016 #6
    Join Date : Apr 2014
    Space coast of Florida
    Posts : 5,339
    Windows 10 Pro X64 16299.19

    What utility do you use to mirror files/folders?
    I use a program called Mirror Folder from TechSoft. I've been using it for years. Not free, but works great.

    This will give you an idea of the interface and capabilities:

    Click image for larger version. 

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      My ComputersSystem Spec
  7.    13 Jun 2016 #7
    Join Date : Aug 2014
    Forever West
    Posts : 3,921
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    I've seen some programs not install if they don't find Virtual Memory/paging file on the computer. I like using 2 drives and put 2GB on the C: [boot] drive and the rest of the written recommended 1.5 times the physical RAM [in Help and Support] on the D: drive.
      My ComputerSystem Spec
  8.    14 Jun 2016 #8
    Join Date : Jul 2014
    Serbia
    Posts : 10,418
    W10 Insider + Linux

    I set PF to 1gb just so some programs requiring it don't complain, that's quite enough even with 8GB of RAM. Even with it turned off windows will do some writing on the system disk so it's not actually "saving" disk from lot's of writing to it, some space only (maybe).
    5% reserved for system restore is enough to keep last 2 or 3 system restore points on my 240GB SSD.
    Superfetch and prefetch are not real threat to SSDs either.
    With current state of SSD technology there's no real reason to treat them any different than just as another Disk Drive.
      My ComputersSystem Spec
  9.    14 Jun 2016 #9
    Join Date : Jun 2015
    UK
    Posts : 2,076
    Windows 10 Home x64 (Laptop), Windows 10 Pro x64 (Desktop)
    Thread Starter

    I'll try your recommendation of having paging files on drives C: and D:. How and when does the OS decided to write to drive C: (SSD) and the larger pagefile on drive D: ?
      My ComputersSystem Spec
  10.    14 Jun 2016 #10
    Join Date : Oct 2014
    Posts : 758
    Windows 7

    The decision as to which pagefile to write to is based on how busy the drive is. It will use the drive that has the shortest write queue. But it does not take performance of the drives into consideration (at least I don't believe so). A secondary drive will usually be less busy. That means the small and fast pagefile on the SSD will rarely be used.

    From a performance standpoint you don't want a pagefile on a secondary drive unless it has performance comparable to the OS drive.
      My ComputerSystem Spec

 
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