Any non-zero value sets the number of processes to be displayed in the Process Status window on the Patrol console. This window shows the “top” processes as sorted by global or routine activity. The default number of processes is 20. A value of 0 tells the Patrol utility to stop calculating the top processes, potentially saving significant work on systems with a lot of processes.
Default is 20.
On the page System Administration > Configuration > Additional Settings > Monitor, for the Patrol Top Processes to Monitor setting, enter a number of processes.