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I run win10 with 16GB RAM (thinking of getting 32GB soon).

My operating system is on a 512GB SSD.

I read that I may benefit by moving the pagefile to a non system drive and since I have 2 more SSDs I want to know if it is advisable to move the page file to a non system (SSD) drive?

I know how to do that, however, I also read that even if you move the pagefile to a non system drive it is still advisable to keep "some" on the system drive.

Is this true? If moving the page file to another SSD advisable, do I need to still keep "some" on the primary drive and if yes how much and how do I that?

Thanks,

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  • I don't see a benefit with SSDs. With HDDs I could see why you'd do that but with an SSD you're not running into the same issues. Where did you read about that split? What was the argument for it?
    – Seth
    Dec 18 '19 at 7:47
  • Imagine that you move pagefile to non-system drive, and it is not available during boot by some reason. How do you think, does OS will boot?
    – Akina
    Dec 18 '19 at 8:00
  • @Seth I read it in various places,. The argument was that R/W operation will not be done on the same drive which can improve performance. Do you think I should not move it?
    – dandan
    Dec 18 '19 at 8:10
  • @Akina by using RAM. Unless you have a very restricted system (which is not the case with 16 GB) you shouldn't need the pagefile during boot.
    – Seth
    Dec 18 '19 at 8:59
  • @dandan it depends on what you do. You can move it if you want to. The argument you've brought up is right for moving it in the first place but not for the split between system and non system drive. The R/W is much more of a problem for mechanical discs. With SSDs this shouldn't be an issue with regular use. In the end what you actually do with your system is a major matter for that decision.
    – Seth
    Dec 18 '19 at 9:01
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You should keep at least some small amount of page file on your system for a crash dump. How much depends on the setting for your system but chances are you as a home user it is set to "small" in which case it does not need to be a large page file at all.

From How to determine the appropriate page file size for 64-bit versions of Windows

System crash dump setting  | Minimum page file size requirement
Small memory dump (256 KB) | 1 MB
Kernel memory dump         | Depends on kernel virtual memory usage
Complete memory dump       | 1 x RAM plus 257 MB*
Automatic memory dump      | Depends on kernel virtual memory usage. For details, see Automatic memory dump.

Whether it is worth moving depends on the types of SSD. There would be little benefit in moving from an NVME SSD to a SATA SSD, due to SATA being slower, but the other direction could be worthwhile.

If they are both the same type then the benefit is going to be marginal and depend on how heavily one drive is used and the type of work you do. Large video editing with page file on the same drive might result in some bus contention in low memory situations, so you'd want the page file on to the other drive from that work.

Other than that there is little benefit to moving it. SSDs are much less prone to the problems of seek times that make hard drives painful to use when they are paging data in and out.

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  • Yes my page file is on an SSD. I wanted to know if it would be wise to move it to a different SSD. The answer I got so far is No - keep it as it is, on the primary C drive.
    – dandan
    Dec 18 '19 at 10:19
  • Moving to another SSD would possibly be a marginal benefit at best, and there are some tradeoffs either way. Are both SSDs SATA or NVME or is there a mix? Sorry, I misread and thought you were putting it on a hard drive.
    – Mokubai
    Dec 18 '19 at 10:28
  • Both are SSDs connected to SATA6 bus. I currently have 16GB RAM and I am thinking of upgrading to 32GB. I usually notice that the pagefile is 16-17GB.
    – dandan
    Dec 18 '19 at 10:37
  • @dandan it mostly depends on your use case then. Benefits are going to be marginal and depend on your workload and which drive is used at the time. I have edited.
    – Mokubai
    Dec 18 '19 at 10:54
  • My page file is always allocated to 16384, even right after reboot. Is this normal? I read that it should not always occupy a size equivalent to my RAM, If I upgrade to 32GB it will occupy 32GB!
    – dandan
    Dec 18 '19 at 17:12

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