On a busy system (e.g., run make in background) try selecting a process. The
process table keeps changing before you've a chance to do anything.
The suggesiton is to, if the user is interacting with the window in some way
(scroll, clicking, searching, ...), hold off refreshes for a bit (a bit being
some number of seconds).
That way the user sees a stable view. If the user leaves things alone then the
refresh again resumes.