What is a key feature of the selector threads used by Grizzly libraries?

The key feature of the selector threads used by Grizzly libraries is that each application has a dedicated selector pool. This means that the threading model is designed such that the handling of I/O operations for each individual application is isolated from others. This dedicated approach allows for performance optimizations tailored specifically to the needs and resource usage patterns of that particular application, ensuring that the selector threads can efficiently manage connections without interference from or contention with other applications running on the same server.

Having dedicated selector pools contributes to better resource management and responsiveness in applications, particularly under heavy load. Each application's selector can operate independently, which allows for more predictable performance and reduces the complexity associated with shared resources. Such a design enhances the overall stability and scalability of each Mule application by preventing cross-application resource competition.