"No space left on device" error message (move database to extra attached storage)
While testing wikis from https://phabricator.wikimedia.org/T362139 I started getting errors preventing me from saving edits on wiki:
Can't create/write to file '/tmp/#sql-temptable-23b0-14ac8-ab.MAI' (Errcode: 28 "No space left on device")
This might be an issue that affects not only these wikis, as a similiar message appears at the top of https://patchdemo.wmflabs.org/