In Internet Information Services (IIS), an application pool is a logical collection of websites or applications served by one or multiple worker processes with the same configuration. Here are some key points about application pools in IIS:
- Application pools enable you to host multiple web applications on a single server in isolation mode for improved security, availability, and performance.
- Each application pool consists of one or more worker processes (w3wp.exe) that execute the web applications.
- The worker processes in an application pool are separated by process boundaries, ensuring that security and performance issues in one application pool dont affect the smooth functioning of applications in other application pools.
- Application pools can contain one or more worker processes, with each worker process representing work being done for a web site, web application, or web service.
- Application pools are used to isolate web applications for better security, reliability, availability, and performance, allowing them to run without impacting each other.
- Managing and monitoring the health of application pools is critical, as the performance of the websites or applications depends on the health of the application pool.
