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Thanks for the very detailed guide. Would you advice to have such a large swapfile? If I remember correctly, the old advice was to have double the storage in swap than in RAM. But after 4 or 8GB of RAM or so, this is no longer needed and just a generic amount of swap is kinda needed.
I'm moving now my swapfile to the nvme. I might put it in /var indeed. Thanks!
On laptops, you normally want at least as much swap space as you do physical memory, as when you hibernate the thing, that's where the hibernation data is stored, and if you don't have enough space there, hibernation will fail. IIRC, it's also required for some kernel debugging technique (where, as hazy memory indicates, I believe the kernel can basically "dump core" to swap space, then reboot and write it out to regular storage). So it certainly works, because there are a lot of Linux systems out there that use that much relative to physical memory. Though I admit that I've never tried using a swap file instead of a swap partition, myself.
It's not quite like the old days, with rotational drives, and pre-OOM killer, where having a huge amount of swap would let the system bog down to the point where it couldn't be used.
Do you need 32GB swap? Probably not, if you don't plan to hibernate the system. But unless you need the storage for something else, probably doesn't hurt. And if you've got a 1TB system drive, I doubt that you're short on space.
I have 128GB of main memory and 128GB of swap on this system. Same 1:1 ratio, and I normally use that on Linux systems.
For the example, I just chose an arbitrary, "reasonable" size. Feel free to pick a size that you feel is better, if you'd prefer something else.