Topic: Media Temple container overloading

I have a small application that uses the acts_as_attachment plugin for uploading usually large files (120 MB on average). Then it basically is a simple list where another user can download the file. There is a super simple authentication system with just the single password for admin functions. It starts fine but once I start using it and uploading files it breaks out of the 64MB Rails container and stops the app.

The application uses more and more of the allocated memory each time I upload something and it never lets it go. Has anyone had any similar experiences or how exactly does the acts_as_attachment plugin transfer the files? Is it loading it into memory and then saving when it finishes? I'm looking to make the app more stable. It is a super simple app so I don't think it needs more than a 64MB container but I could be wrong. Any help is appreciated.