A dedicated application pool is an application pool that is used to isolate your applications from other users, making your website more effective and secure. However, not all Windows hosting companies offer dedicated application pools but allow customers to share one application pool with other people instead. In this case, the website cannot run efficiently because of a series of negative effects.
To be frank, many people still don’t know why they need a dedicated application pool and have not recognized the importance of it. Supposed that one of your sharers suffer downtime issue on his website, will yours beat the rap? Obviously, the answer is not. And also, if the application pool is overloaded, that will slow down your website certainly. Just like people crowd into a swimming pool and jostle with one after another for a tiny pace. How can they enjoy swimming as usual?
As thus, the dedicated application pool helps to cope with those worries for people who wish to not share resources with others. For the application pools being isolated, the restrictive user account is able to prevent threats from third parties. This method is especially valid for some enterprise websites having high demands on reliability and security.