overcome limited RAM on VPS (lemmy.world)

submitted 1 year ago by aesir@lemmy.world to c/linux@lemmy.ml

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Hi,

Do you have suggestions for kernel tweaks for getting the most out of a RAM limited system?

I am running a service requiring 2GB of RAM (netbird) on a VPS which has just 1 GB of memory. I am doing so because I am a stingy bastard and I use only free VPSs for my personal use so I get what I am paying for.

Because of this hardware limit in about 12 hours from service start I begin swapping a bit too much. This would still be manageable but soon the hypervisor gets really pissed and steals up to 90% of the CPU. So the only solution so far is restarting the docker containers every 12 hours (not great, not terrible).

Looking to improve this, Iam now experimenting with ZRAM and swappiness and it seems some benefit can be achieved by using some of the Linux kernel feaures. Is there anything else I should look into?

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[-] Lojcs@lemm.ee 2 points 1 year ago

Ask the provider not to throttle you then? Are you not entitled to the entire cpu?

[-] nous@programming.dev 4 points 1 year ago

I use only free VPSs

So probably not entitled to anything from them.

[-] aesir@lemmy.world 2 points 1 year ago

I believe it's a shared VCPU intentionally, I will recheck the terms and conditions, but I think I am not in the position to claim much.

this post was submitted on 01 Oct 2023

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