An Application Pool separates your web applications for better security, reliability, and availability. SmarterWebhosting assigns dedicated application pools to each client based on their hosting plan.
Each hosting plan comes with a specific Private Memory Limit for its App Pool:
If your website consumes memory exceeding its assigned limit, the IIS server will automatically recycle the application pool. This briefly stops and restarts your application to clear the memory. Frequent recycling can cause your website to respond slowly.