fix(proxmox): power saving

Virtualization/ProxMox/proxmox-cpu-consumption.md

@@ -9,7 +9,16 @@
     ```bash
     cpufreq-info -g
     ```
-4. Set the governor to `powersave` via `cpufreq-set -g powersave`
+4. See current governor
+    ```bash
+    cpufreq-info -p
+    ``
+5. Set the governor to `powersave` via `cpufreq-set -g powersave`
     ```bash
     cpufreq-set -g powersave
     ```
+6. Make it persistent
+    ```bash
+    echo 'GOVERNOR="powersave"' |  tee /etc/default/cpufrequtils
+    ```
+

Virtualization/ProxMox/proxmox-energy-consumption.md

@@ -0,0 +1,51 @@
+# Reduce energy consumption of Proxmox
+
+## Powertop
+
+[Powertop](https://wiki.archlinux.org/title/powertop) is a tool to diagnose issues with power consumption and power management.  
+It can also be used to tune power management settings.
+
+### Install powertop
+
+```bash
+apt install powertop
+```
+
+### Run powertop calibration
+
+Calibration will toggle various functions on and off to determine the best settings for your system.
+So it is best to run this when the system is idle.
+
+```bash
+powertop --calibrate
+```
+
+### Run powertop to see recommendations
+
+With <TAB> you can switch between the different tabs.
+
+```bash
+powertop
+```
+
+### Auto tune power management settings (not reboot persistent)
+
+```bash
+powertop --auto-tune
+```
+
+### Systemd service to auto tune power management settings (reboot persistent)
+
+```bash
+cat << EOF > /etc/systemd/system/powertop.service
+[Unit]
+Description=Powertop tunings
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/sbin/powertop --auto-tune
+
+[Install]
+WantedBy=multi-user.target
+```