=over =item setpriority WHICH,WHO,PRIORITY X<setpriority> X<priority> X<nice> X<renice> Sets the current priority for a process, a process group, or a user. (See L<setpriority(2)>.) Raises an exception when used on a machine that doesn't implement L<setpriority(2)>. C<WHICH> can be any of C<PRIO_PROCESS>, C<PRIO_PGRP> or C<PRIO_USER> imported from L<POSIX/RESOURCE CONSTANTS>. Portability issues: L<perlport/setpriority>. =back