When MySQL runs out of disk space the first sign was for me that queries kept hanging. My first though was not to see if MySQL ran out of disk space but eventually I was able to find this in the logs of the MySQL service. It would be a very good addition if things like this will also show up in the "Debug" tab and possible even be a monitoring thing since running out of disk space has the potential to corrupt the database. So it would be great if early warnings can be shown and if the user let it come that far it's clearer from the UI then just in the logs of the MySQL container.

Edit: I did receive a 80%+ storage used e-mail once. I feel like there could be a few more especially if the storage keeps increasing and/or UI warnings in overviews.

Maybe this is a bit more then I can expect but this feels correct for managed databases to be clear about to the user.

In my case this was MySQL but I can imagine this goes for every other type of database you offer too ofcourse.