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Systemd Timer for tmux-resurrect Auto-Save

An alternative to the default status-right based auto-save that uses a systemd user timer instead.

Why?

The default auto-save mechanism uses #() command substitution in tmux's status-right. This command runs on every status bar refresh for every attached client. With many sessions and clients, this can cause significant CPU overhead.

A systemd timer runs the save script once per interval, regardless of the number of sessions or clients.

Setup

Copy the unit files to your systemd user directory:

cp systemd/tmux-resurrect-save.service ~/.config/systemd/user/
cp systemd/tmux-resurrect-save.timer ~/.config/systemd/user/

Adjust the path in the service file if your tmux-resurrect is installed somewhere other than ~/.tmux/plugins/tmux-resurrect/.

Enable and start the timer:

systemctl --user daemon-reload
systemctl --user enable --now tmux-resurrect-save.timer

Then disable the status-right based auto-save in your tmux.conf:

set -g @continuum-save-interval '0'

Verify

Check the timer status:

systemctl --user list-timers | grep tmux

Manually trigger a save:

systemctl --user start tmux-resurrect-save.service