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Thread: FSX and Paging File

  1. #11
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    I remember from my mainframe days how much even a small amount of additional RAM on OS/MVS360 would improve remote-user response time because of the reduced paging.

    And the image of MSFS2020 crossing the 16 GB barrier repeatedly would produce furious paging,

    As RAM has gotten cheap these days then if you have a RAM issue then throw RAM at it.

    Jorgen

  2. #12
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    Quote Originally Posted by loki View Post
    Having a page file means Windows can move inactive data (including operating system tasks not needed at that point in time) out of RAM to make just that much more room for the sim.
    It's important to note that not everything gets swapped out to the page file. Code and memory mapped files do not, since they are already backed on disk (with the original image). Again, once you get over a certain amount of RAM, increasing the size of the page file won't do much either way. When you start swapping seriously your system will slow to a crawl. I set a 5GB page file with 32GB and have ignored it ever since.

    Cheers!

    Luke

  3. #13
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    Quote Originally Posted by jorgen.s.andersen View Post
    I remember from my mainframe days how much even a small amount of additional RAM on OS/MVS360 would improve remote-user response time because of the reduced paging.
    Bit of a different situation and not really relevant to a modern personal desktop system though, is it? Especially if your page file is on an SSD.

    As RAM has gotten cheap these days then if you have a RAM issue then throw RAM at it.
    Sure, the ideal solution is more physical RAM, however, why would you want to completely disable what is essentially cheap insurance for running out in the mean time? I have yet to see any downside to keeping the page file. Set the page file to a fixed size, sure, but I think trying to outsmart the Windows memory manager by disabling it completely is a poor idea. If anything, someone who doesn't really understand what they're doing will follow this advice, forget about the setting and then wonder why they get a memory related error a month or two down the road, and blame the program or Windows.

  4. #14
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    Quote Originally Posted by Luke View Post
    It's important to note that not everything gets swapped out to the page file. Code and memory mapped files do not, since they are already backed on disk (with the original image). Again, once you get over a certain amount of RAM, increasing the size of the page file won't do much either way. When you start swapping seriously your system will slow to a crawl. I set a 5GB page file with 32GB and have ignored it ever since.
    Yep, how memory is managed is a bit more complicated than many people think. Increasing the page file certainly isn't going to solve a serious shortage of RAM, no, but going the other way and removing it entirely is more likely to cause someone trouble than just leaving it alone.

    After my last Windows install I just left it as system managed, even with 32GB of RAM. And so far it has just sat around 5-6GB without any intervention on my part.

  5. #15
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    What Luke says here:

    "When you start swapping seriously your system will slow to a crawl."

    is absolutely correct. It is the constant "open file" and "close file" that takes up the time and CPU cycles.

    Jorgen

  6. #16

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    Quote Originally Posted by jorgen.s.andersen View Post
    What Luke says here:

    "When you start swapping seriously your system will slow to a crawl."

    is absolutely correct. It is the constant "open file" and "close file" that takes up the time and CPU cycles.

    Jorgen
    `Let Windows (10) handle it`. What makes anyone think they know better?

    What does FSX say about it?

  7. #17
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    Quote Originally Posted by jorgen.s.andersen View Post
    What Luke says here:

    "When you start swapping seriously your system will slow to a crawl."

    is absolutely correct. It is the constant "open file" and "close file" that takes up the time and CPU cycles.

    Jorgen
    If it's such a big performance hit there should be evidence that disabling the page file on current systems makes a noticeable difference. So far I have not seen any.

  8. #18
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    Hi,
    Might be worth having a look at this page, if you scroll down about 3/4 of the way,
    you will find a very good description of the page file and how best to set up, this is
    just a short extract of the article.

    I have used Nick Needham's guides in all my FS installs, and for me they just work

    "I am going to add a lot of information below about the Windows Page File because
    there are far too many myths and far too many nonsense instructions on the internet
    about this subject. If you set the page file as I defined in STEP #9 above you can skip
    this next section and move on to SPECIAL SECTION FOR SSD WINDOWS DRIVES, or,
    you can review the information I posted below if you would like to educate yourself on
    the subject.

    IMPORTANT INFORMATION ABOUT THE WINDOWS PAGE FILE:

    With respect to a game system or any typical single user computer with mechanical
    hard drives, the ONLY DRIVE a page file should be located on is the Windows drive.
    It is a MYTH and COMPLETELY FALSE that moving the Windows page file OR turning
    the page file OFF will make Windows run better.

    Please do NOT FALL INTO THE: 'I Must Tune the Page File" trap!

    Let me make something perfectly clear.. PAGE FILE TUNING is for disk space conservation,
    nothing else. Setting it TOO LOW with low system memory and high application demand on
    system memory is not good. If you run out of system memory, install more memory don't
    make a larger page file!

    PLEASE NOTE THIS IMPORTANT FACT: there is NO SUCH THING AS A PAGE FILE THAT IS TOO BIG
    and that a large page file makes Windows run poor. The only downfall is, it takes up drive space,
    that is all!. A system can have an entire 1TB drive dedicated to a Windows page file (which of course
    is ridiculous) and it will NOT SLOW NOR MAKE WINDOWS FASTER regardless of the demand.

    Running FSX with all addons and Windows does NOT require any more than 6GB-8GB of physical
    memory. IF you are short of memory your system needs MORE MEMORY and not a page file move.
    Purchase more memory and do not move the page file, AND, make sure the version of Windows
    in use SUPPORTS the amount of memory you need!
    "

    https://www.simforums.com/forums/the...opic46211.html

    Cheers
    i7-4770K 4.60 GHz (Hyperthreading off) Liquid Cooling 16GB G-Skill DDR3 GeForce GTX1050Ti 4GB 500GB WD Blue 3D SSD SATA III x4 Creative Sound Z Sound Card 5.1Ch 24BitAvermedia video capture card CH Yoke and Rudder NZXT Fan Controller Windows10 64 Prof FS9 - FSX -FSX-SE Track Hat

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