/usr/share/munin/plugins/proc_pri is in munin-node 1.4.6-3ubuntu3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | #!/bin/sh
# -*- sh -*-
: << =cut
=head1 NAME
proc_pri - Munin-plugin to monitor the processes priority on a Linux
machine
=head1 CONFIGURATION
No configuration
=head1 AUTHOR
Lars Strand
=head1 LICENSE
GNU GPL
=head1 MAGIC MARKERS
 #%# family=auto
 #%# capabilities=autoconf
=cut
. $MUNIN_LIBDIR/plugins/plugin.sh
if [ "$1" = "autoconf" ]; then
	echo yes
	exit 0
fi
if [ "$1" = "config" ]; then
    echo 'graph_title Processes priority'
    echo 'graph_order low high locked'
    echo 'graph_category processes'
    echo 'graph_info This graph shows nuber of processes at each priority'
    echo 'graph_args --base 1000 -l 0'
    echo 'graph_vlabel Number of processes'
    echo 'high.label high priority'
    echo 'high.draw STACK'
    echo 'high.info The number of high-priority processes (tasks)'
    print_warning high
    print_critical high
    echo 'low.label low priority'
    echo 'low.draw AREA'
    echo 'low.info The number of low-priority processes (tasks)'
    print_warning low
    print_critical low
    echo 'locked.label locked in memory'
    echo 'locked.draw STACK'
    echo 'locked.info The number of processes that have pages locked into memory (for real-time and custom IO)'
    print_warning locked
    print_critical locked
    exit 0
fi
echo -n "high.value "
ps --no-header -eo stat | grep \< | wc -l
echo -n "low.value "
ps --no-header -eo stat | grep N | wc -l
echo -n "locked.value "
ps --no-header -eo stat | grep L | wc -l
 |