The ALTPRI privilege allows the user's process to:
Increase its own base priority
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 priorityor the base priority of another process. However, one process canset the priority of a second process only if one of the followingconditions applies:
The process calling the $SETPRI systemservice has the same UIC as the target process.
The calling process has process control privilege(GROUP or WORLD) over the target process.
With ALTPRI, a process can create a detached process witha priority higher than its own. It creates such a process by usingan optional argument to the Create Process ($CREPRC) system serviceor 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 thesystem parameter MAXQUEPRI.
Do not grant this privilege widely; if unqualified users havethe unrestricted ability to set base priorities, fair and orderlyscheduling of processes for execution can easily be disrupted.
HP OpenVMS Guide to System Security
Security for the System Administrator
