top, by default, lists both columns. I am curious as to what is the difference. I checked out the man pages and cannot figure it out:
h: PR -- Priority The priority of the task.
i: NI -- Nice value The nice value of the task. A negative nice value means higher priority, whereas a positive nice value means lower priority. Zero in this field simply means priority will not be adjusted in determining a task’s dis- patchability.
I understand that Nice value is related to the Kernel's CPU scheduler queue; then what does Priority indicate? Something regarding I/O perhaps?