Troubleshooting High IO Wait on My Home Server with systemd and top

Introduction to High IO Wait

I’ve been running my home server for a while now, and lately, I’ve noticed it’s been experiencing high IO wait times. This has resulted in slower performance and increased latency. I’ve seen this go wrong when disk usage, memory constraints, and system configuration aren’t properly balanced. In this article, I’ll walk you through the steps I took to troubleshoot and resolve the high IO wait issue on my home server using systemd and top.

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Taming Resource-Intensive Background Jobs with nice and ionice

Introduction to Resource Management

As someone who’s spent years running Linux systems, I’ve learned that managing background jobs is crucial for maintaining system performance. Whether you’re running a homelab, self-hosting services, or just using your Linux machine for everyday tasks, it’s essential to keep resource-intensive jobs in check. In this article, I’ll dive into how to use nice and ionice to tame these jobs and keep your system responsive.

Understanding nice

The nice command is a simple way to set the priority of a process. By default, Linux gives all processes a nice value of 0, which is normal priority. You can adjust this value using the nice command, with values ranging from -20 (highest priority) to 19 (lowest priority). To use nice, just prefix your command with the nice command and the desired nice value. For example:

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