The ALTPRI privilege allows the user's process
Increase its own base
Set the base priority
of a target process
Change the priority of
its batch or print jobs
The base priority is increased by executing the
Set Priority ($SETPRI) system service or the DCL command SET PROCESS/PRIORITY.
As a rule, this system service lets a process set its own base priority
or the base priority of another process. However, one process can
set the priority of a second process only if one of the following
The process calling the
$SETPRI system service has the same UIC as the target process.
The calling process has
process control privilege (GROUP or WORLD) over the target process.
With ALTPRI, a process can create a detached process
with a priority higher than its own. It creates such a process by
using an optional argument to the Create Process ($CREPRC) system
service or to the DCL command RUN/PRIORITY.
ALTPRI also lets you adjust the scheduling priority
of a job ($SNDJBC) to a value even greater than that established with
the system parameter MAXQUEPRI.
Do not grant this privilege widely; if unqualified
users have the unrestricted ability to set base priorities, fair and
orderly scheduling of processes for execution can easily be disrupted.