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claude-memory/graph/fixes/high-cpu-on-docker-host-from-avahi-daemon-and-gnome-775506.md
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id type title tags importance confidence created updated relations
775506ce-ed06-4c36-95f3-73379855b44a fix High CPU on Docker host from avahi-daemon and GNOME
cpu
docker
avahi
gnome
gdm
performance
homelab
fix
0.7 0.8 2025-12-20T04:36:05.718983+00:00 2025-12-20T04:36:05.718983+00:00
target type direction strength
62ee21e8-2b56-4d38-a73d-47e2724f08c6 BUILDS_ON incoming 0.5

Problem: Docker host showing constant ~12% CPU usage from background services.

Root Cause:

  1. avahi-daemon (mDNS) constantly processing Docker veth interface changes (67+ hours accumulated CPU)
  2. gvfs-udisks2-volume-monitor (GNOME disk monitor) running unnecessarily on server
  3. gdm and gnome-shell running on headless server

Solution:

# Disable avahi (including socket to prevent respawn)
sudo systemctl stop avahi-daemon.socket avahi-daemon
sudo systemctl disable avahi-daemon.socket avahi-daemon

# Disable GNOME desktop
sudo systemctl stop gdm
sudo systemctl disable gdm

# Kill lingering processes
sudo pkill -f gvfs-udisks2-volume-monitor

Result: ~12% CPU and 180MB RAM recovered.

When to apply: Any Docker host with desktop environment installed that doesn't need GUI access.