this post was submitted on 07 Jul 2023
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I've heard a lot of people say your swap should be 2x RAM.. but do I really need 32GB of swap?

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[–] [email protected] 8 points 1 year ago* (last edited 1 year ago) (2 children)

On a desktop or especially laptop case, it should be equal to (or larger than) your RAM if you use hibernation (as RAM gets copied to swap during hibernation)

On my server, I set it up to be 2GBs, mostly arbitrarily. Right now it's at 500MB, but my main memory is also only 600-800MB full out of the total 4GBs available, so I'm not running out of RAM anytime soon.

Swap behavior seems to have changed a while ago, so consider reading https://chrisdown.name/2018/01/02/in-defence-of-swap.html on how it works right now. Hell, even that might be outdated nowadays. Up to date info on how swap works really seems hard to come by.

[–] [email protected] 1 points 1 year ago

Also make sure to count GPU memory, as that will have to be written to swap on hibernate.

[–] [email protected] 1 points 1 year ago

That was very informative, thanks.