This video is the seventh in a series of free webinars for you, our customer. This one is titled: Maintaining the vCenter Server Database. It provides a high level overview of the vCenter Server Database architecture as well as best practices and tips for maintaining the database.
The video is roughly 15 minutes in length so it would be worth blocking out some time to watch it.
To see details of upcoming webinars in this series, see the Support Insider Blog post: New Free Webinars.