Don't contact the hosting provider. Imagine, for example, that you want people to be able to crop their user icon on the site. Most sites won't need to worry about hard drive space. In the event you are opting for managed cpanel dedicated server plans, you are in a better position to get assistance.
SQL queries, which are the standard way of getting information out of a database, can quickly eat up CPU cycles. Without the hosting provider, there would be significant infrastructure and operating costs to running a data center. If there is a problem with slowness on the network, contact the reseller. Regardless the reason, many times a site slowdown is due to hardware that isn't up to the task.
At the same time, the extra services that they provide are often what the customer needs and can't get from anywhere else. Maintaining a connection is all about keeping all the information associated with it in memory for easy access. For example, those who need a dedicated server in order to support a large church website may need web design services, ecommerce services for tithing, and more that are particular to religious organizations.
A Web host's data center is the physical location where their servers are located. But if the company grows at all, that shared server soon won't be enough and it will be time to make the switch to a dedicated server. The hosting provider sells products and services that are pretty generic and general.
