What does the 'Nice' column represent on the processes tab of the system monitor?
'nice' refers to the priority the process gets on your CPU. This is a number in the range of -19 (highest priority) to 20 (lowest). You'll probably find that most applications you're running are at nice '0', which means that they are running with normal priority and none will get preferential treatment by the scheduler over another.
If you're running an intensive program, you may wish to launch it from a terminal with
Note that you need root (
There's a good explanation on Wikipedia too.
Nice is not simply priority multiplied by minus one.
You will find that on unix/linux systems that if a task is hogging the processor that the system does not grind to a halt. This is because the system will dynamically lower this tasks priority.
The niceness influences the base priority. So while niceness can be thought of as negative priority, it will have less of an effect than priority would have an a MS-NT system, as the scheduler is already doing a good job at keeping things nice.