CALL SLEEP puts the
DATA step in which it is invoked into a nonactive wait state, using
no CPU time and performing no input or output. If you are running
multiple SAS processes, each process can execute CALL SLEEP independently
without affecting the other processes.
Note: Extended sleep periods can
trigger automatic host session termination based on time-out values
set at your site. Contact your host system administrator to determine
the time-out values that are used at your site.