We got an urgent call from a new client that has many clients of its own. They do have a SaaS application with more than 1000 clients. Our consulting firm provides MySQL and MS SQL as remote dba services. They needed help with MySQL database right away.
Imagine the client has SaaS app with more than 1000 clients of his own. For every client there is one dedicated database. Obviously, the client created a nightmare maintenance for himself. Just to spice up the situation every database seems different then the other one. Either the indexes are different, or in some cases some columns in certain tables are different. A Real mess!