It is all about an IT need and a business expectation.
Most IT professionals want as little change as possible. After all, at the end of the day, the ultimate responsibility is to make sure applications run, and run well. Less change usually equals more stability. The mantra usually goes, “If it’s not broken, why mess with it?”
However, life for database administrators (DBAs) is rife with change these days, whether they want it or not, including major evolutions that impact every IT department. With so many changes and variables, the old way of figuring things out — trial and error — no longer works. What DBAs and all IT professionals need, and what the business expects from IT, is performance certainty.