It's when a website becomes a success that we start to see the limits of shared web hosting. Even if many host providers promise unlimited access, in reality this is rarely the case.
One possibility consists of moving to a dedicated server, a mode of web hosting exclusively dedicated to your websites. You are the only one on the machine, you can host many sites or just a few of them if they're greedy in database resources for example.
Most dedicated server services are in Linux, and although most servers are supplied with an administration interface, in-depth knowledge of administration systems is particularly useful.
Just like a dedicated server with fewer problems. With a virtual server you have all the advantages of a dedicated server when it comes to possibilities and flexibility, with a few constraints in terms of power and space. The virtual server is a sub-group of a dedicated server on which several independent virtual servers exist. You share the same physical server but with guaranteed disk usage, cpu and memory. The material infrastructure is generally better looked after by the host provider so you don't have to worry about the durability for the hardware, in contrast to a classic dedicated server.