around 18:20: Upgrading plugins via the web interface resulted in errors. The Nextcloud instance was then in upgrade mode.
18:23: Instance taken offline to investigate the problems. Activated maintenance mode. Maintenance mode prevents users from logging in and performing any actions.
18:30: Initiating a full backup before attempting any repairs.
19:50: Backup completed.
19:50: Updating all applications via the management CLI.
Update Nextcloud from 16.0.0.11 (16.0.1 release) to 16.0.2.1 (16.0.2 release).
Database (mariadb) updated from 10.6.4 to 10.11.4
20:15: Problems appear to have be resolved. Disable maintenance mode and bring the instance back online. Outage resolved.
15.06. The image of the office was also updated. This broke the office because a configuration parameter changed . This is now also fixed.
Don’t upgrade applications via the Nextcloud web interface. Comment: It is new to me that upgrading applications via the web interface could cause problems. This should not happen imo.
The general query log is 149GB in size. Keeping the raw query log is unnecessary and makes backups unnecessarily slow and large. The log should at least be switched to the binary log or disabled altogether. -> 2023-06-13: The query logs have been disabled.