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A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.

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How much swap? (lemmy.ca)

submitted 1 year ago by [email protected] to c/[email protected]

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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] 5 points 1 year 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.

[–] [email protected] 6 points 1 year ago* (last edited 1 year 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.

[–] [email protected] 1 points 1 year ago (1 children)

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

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

[–] [email protected] 4 points 1 year 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

[–] [email protected] 1 points 1 year 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