For the reason mentioned it is better to set the timing during the day (that is what we do). But if you upgrade automatically during the day you'll have a bit o

For the reason mentioned it is better to set the timing during the day (that is what we do). But if you upgrade automatically during the day you'll have a bit of downtime during the day. By default the Omnibus packages will stop, run migrations, and start again, no matter how “big” or “small” the upgrade is. The behaviour can be changed by adding a /etc/gitlab/skip-auto-migrations file. Obviously if you installation grows you can review the needed upgrades in advance and prevent downtime in most cases.