From Lunarpages Web Hosting Wiki
How many simultaneous connections or logins to mySQL I can have under a VPS?
The server limits between the shared hosting plans (Basic, Business and Windows) and the VPS hosting plans Lunarpages provides are very different. Since you are on a server with fewer people, your server limitations are lightened.
There is no restrictions from the shared hosting on VPS. The only limit for you will be resources of your VPS server, when it concerns the number of simultaneous connections or logins you can have to a mySQL database.