this post was submitted on 07 Jul 2023
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How much swap? (lemmy.ca)
submitted 3 years ago by sam@lemmy.ca to c/selfhosted@lemmy.world
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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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[–] SJ_Zero@lemmy.fbxl.net 5 points 3 years ago (2 children)

There's people who make dumb arguments that go "but what if you run out of ram?" And then someone else says "I have enough ram" and then someone else goes "but what if you run out of ram?"

I have a small amount of swap, a few gigs, and enough memory for the application. Moreover I also have my swappiness set to 0 because I don't want stuff swapped out of memory. If I need more memory I need more memory.

[–] takeda@kbin.social 6 points 3 years ago* (last edited 3 years ago) (1 children)

I'm one of those people.

I will leave you this: https://chrisdown.name/2018/01/02/in-defence-of-swap.html

This is a nice read from a kernel developer responsible for memory management.

[–] dpflug@hachyderm.io 1 points 3 years ago (1 children)

@takeda
Thanks for sharing. Always good to learn more.
@sam @SJ_Zero @selfhosted

[–] CommunityLinkFixer@lemmings.world 1 points 3 years ago

Hi there! Looks like you linked to a Lemmy community using an URL instead of its name, which doesn't work well for people on different instances. Try fixing it like this: !selfhosted@lemmy.world

[–] eh@nerdbin.social 4 points 3 years ago (1 children)

Moreover I also have my swappiness set to 0 because I don’t want stuff swapped out of memory. If I need more memory I need more memory.

I don't think swappiness has worked that way for a while now.

https://chrisdown.name/2018/01/02/in-defence-of-swap.html

[–] SJ_Zero@lemmy.fbxl.net 1 points 3 years ago

It does. I can vouch for it's behavior in practice. My servers basically sit with the swap file unused, which isn't the case when I set swappiness to a non-zedo value