How to Use Linux Server Control Groups for Resource Management

In this episode of Linux Server Admin, Lucas and Luna dive into control groups, or cgroups, the kernel feature that underpins container resource limits and systemd resource control. You'll learn how cgroups work under the hood, why they matter for modern server workloads, and how to use systemd's built-in resource control directives to cap CPU, memory, and I/O for services and user slices. With real-world examples like limiting a runaway PHP-FPM pool or prioritizing a database over batch jobs, this episode gives you practical commands and configuration you can apply today. If you've ever hit mysterious OOM kills or noisy-neighbor issues on a shared server, this conversation will help you take back control. Plus, a quick look at how cgroups v2 changed the game and what that means for your containers and systemd units.

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