Configurable over hardcoded

Make configuration parameters configurable rather than hardcoding values, especially for limits, sizes, and thresholds. Provide reasonable defaults but allow users to override through:

1. Constructor parameters for instance-specific configuration
2. System properties for application-wide defaults
3. Public accessor methods for runtime feature detection

For related configuration parameters, design APIs that ensure they are set cohesively to prevent invalid states:

// Prefer this:
public IoUringIoHandlerConfig setSize(int ringSize, int cqSize) {
    // validate interdependent parameters together
    return this;
}

// Over separate methods that could create invalid configurations:
public IoUringIoHandlerConfig setRingSize(int ringSize) { ... }
public IoUringIoHandlerConfig setCqSize(int cqSize) { ... }

When exposing configuration capabilities, make feature detection methods public to help users adapt to different environments:

if (IoUring.isRecvMultishotEnabled()) {
    // Use optimized configuration
}

Size-related parameters should be derived from existing configurations when reasonable rather than using arbitrary hardcoded values.