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Is there a formula by which Windows calculates recommended paging file size? (see picture). This is definitely not 1,5 x RAM (this PC has 8 GB or RAM). I need to implement this calculation in my custom software, but can't seem to understand where Windows gets this value from.

Thanks!

Recommended size

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  • @Hannu Disabling pagefile is a bad idea in general.
    – gronostaj
    Aug 15, 2014 at 12:02
  • Has it always been 8GB? I find when RAM is added that the paging file size is not adjusted. Aug 15, 2014 at 12:20
  • Yes, it always had 8 GB.
    – YMM
    Aug 15, 2014 at 12:45
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    @gronostaj - agreed! Removed the comment, rephrased here: Generally, duplicating functionality is a bad idea. With abundance of RAM the system generally does not use much Vmem. With small amounts of RAM the need for Vmem rises, but there also is a penalty in having too much Vmem - as it needs to be handled. Practical experience: Running WinXP in 2GB RAM with 4GB of Vmem - works well for <50 megapixel images in Photoshop <= CS5. At 100 megapixel you're crawling - it may take an hour to just save the file.
    – Hannu
    Aug 16, 2014 at 8:39

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