It was time for a clean-up. For my own surprise the query to delete all chat messages took almost 3 Minutes (177 seconds).
Usually a query takes less than a second, mostly few or some hundreds of milliseconds to execute. If the query is super complex it can take a second or two but 180 is really a lot :O.
This clean-up might speed up some online interactions in JP Schoolgirl Supervisor Multiplayer.
PS: Don’t be worry about your RUNES Achievements. They are logged separately.