implementing CPU performance throttling in Ubuntu 22.04 while running Docker containers
I'm attempting to set up I've searched everywhere and can't find a clear answer..... I'm experiencing important CPU performance throttling on my Ubuntu 22.04 server when running multiple Docker containers. Despite using a powerful machine with an AMD Ryzen 7 processor and 32GB of RAM, I'm seeing unusually high load averages and slow response times from my applications. I have a Docker setup that runs several services, each in its own container, and I've configured CPU limits in my Docker Compose file like this: ```yaml version: '3.8' services: app: image: myapp:latest deploy: resources: limits: cpus: '1.0' volumes: - ./app:/app worker: image: myworker:latest deploy: resources: limits: cpus: '0.5' ``` I've tried removing the CPU limits to see if that alleviates the scenario, but it didn't help. Additionally, I checked the `cgroup` settings and I can see that the containers are being allocated the appropriate CPU shares. Running `top` shows that the `docker-containers` process is consuming a lot of CPU time when the containers are active. I also enabled the `cpufreq` governor settings, and switched between `ondemand` and `performance`, but there doesn't seem to be a noticeable difference. When I execute a single container, performance seems reasonable, but once I scale them out, the overall system feels sluggish. The output of `docker stats` showed that some containers are consistently hitting their CPU limits even when the host CPU utilization is below 50%. I suspect there's some underlying scenario with how Docker is managing resources or perhaps an interaction with the Linux kernel settings. Could someone provide insight into optimizing Docker container performance under these conditions or suggest any debugging steps I might have missed? Additionally, are there specific configurations I should be aware of in Ubuntu 22.04 that might impact container performance? How would you solve this? Any advice would be much appreciated. For context: I'm using Yaml on Ubuntu 22.04.