Occasionally I get very high CPU load. Generally the operation is very smooth but then there are those burst of full CPU load. While that is happening, the forum give 502 errors or is VERY slow. I have a Hetzner server with 3 vCPUs and 4 GB of RAM. [Bildschirmfoto 2025-10-11 um 20.43.18] Anyone h…

This is what the console in the Hetzner backend shoes: [Bildschirmfoto 2025-10-11 um 20.43.06]

[изображение] GeorgSeifert: Anyone has an idea what could cause this? Can you run htop or similar on the server, to identify the process name which is causing the high CPU load?

A periodic process is running. Do you have swap? You’re running out of memory. I would add 2 to 4gb of swap.

I had to wait to catch an high CPU event. I ran htop and took some screenshots (I never used it so I don’t know what I’m looking at). [Bildschirmfoto 2025-10-13 um 20.42.31] [Bildschirmfoto 2025-10-13 um 20.43.30] [Bildschirmfoto 2025-10-13 um 20.43.55] [Bildschirmfoto 2025-10-13 um 20.43.02…

[изображение] pfaffman: Do you have swap? You’re running out of memory. I would add 2 to 4gb of swap. This is the first thing to do.

No swap is not a good look here, you are dangerously close to major issues.

@GeorgSeifert were you able to resolve your issue? If adding swap is the fix, please mark @pfaffman ’s post as the solution. It’s the button on the post menu that looks like a square with a checkmark in it.

I tried a different sever that has more RAM but slower CPU and is cheaper. I’ll monitor this for a few days.

Did you add swap? That is essential.

I thought double the physical RAM should do for now. The Discourse page says that a server with 1-2 MB RAM is enough to run it. So I thought I’m kind of save with 4 MB? Now it has 8. I’m not sure if our forum has a lot trafic (I just check the Reports and it says 15 logged in and 1000 not logged i…

Иногда очень высокая загрузка CPU

Поддержка

GeorgSeifert 11.Октябрь.2025 18:56:10 2

This is what the console in the Hetzner backend shoes:

Тема		Ответов	Просм.
CPU, Memory and Swap at 100% Self-hosting server-resources	7	667	08.12.2021
Discourse unavailable with high load average Support	21	2483	26.04.2021
Forum Unusable due to "Can’t save in background: fork: Cannot allocate memory” Self-hosting	13	2487	05.10.2020
Is 1GB RAM enough for both WordPress and Discourse? Self-hosting server-resources	22	4743	08.06.2024
Woke up to "too many requests error" Support	11	1058	01.12.2022

Иногда очень высокая загрузка CPU

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