mathstodon.xyz just went down for a bit because we ran out of space. I've "solved" the problem by deleting images for preview cards in toots.
We have 21G of media attachments, which is mad for an instance this small. Running 'tootctl media remove' to get rid of remote media removes 0 files.
#MastoAdmin @Gargron is there a way I can work out which toots attachments belong to, from the command line? I suspect the recent wave of bot accounts that never tooted might be responsible