Restart/Stop Kernel

Restart and Shutdown

field	description
Hot Restart	A hot restart performs a partial shutdown of NetKernel which will involve minimal interruption to services by not stopping transports which do not need to be stopped. No requests will be lost or rejected. New modules can be added or upgraded and modules removed. Only these modules will change, all others are left unaffected. Changes to configuration of the Kernel in system.xml are detected. It is useful for changing configuration of a live server.
Cold Restart	A cold restart performs a full shutdown of NetKernel and then a fresh startup. This will involve transport downtime and a short interruption to services. It will force all module classes and resources to be reloaded so it is useful for development.
Kernel Shutdown	A Kernel Shutdown will allow all pending requests to complete whilst rejecting new requests before terminating all transports and finally stopping the kernel. The kernel cannot be started again using the control panel. It must be started manually.

Since restarting the system is a critical operation you will be prompted to confirm your action.