Laurenz Albe uncovers an oddity:
Recently, I helped a customer investigate database problems. It turned out that these problems could be traced back to too many tables in the database. Since this may come as a surprise to many users, I thought it worth the while to write about it.
Click through to see what was happening, as well as a demonstration of the problem. Granted, when you start talking about tens of thousands of tables, something has gone catastrophically wrong in your database architecture.