93,000 chunks of "residue"
That's the fun thing about GeekSpeak™, it doesn't have to make sense, it just rolls trippingly off the tongue (and down the fingers) like a modern version of Finnegan's Wake.
There weren't 93,000 posts backed up in the system. These were side-effects of the process of posting, the residue of posts, you might say...to make blunt the metaphor I was skirting, they were message post turds that weren't getting flushed after the nourishing content had been extracted by the system. The HabitableZone was getting pretty badly constipated.