librenms-librenms/includes/polling/hr-mib.inc.php

<?php

// HOST-RESOURCES-MIB
// Generic System Statistics
$oid_list = 'hrSystemProcesses.0 hrSystemNumUsers.0';
$hrSystem = snmp_get_multi($device, $oid_list, '-OUQs', 'HOST-RESOURCES-MIB');

if (is_numeric($hrSystem[0]['hrSystemProcesses'])) {
    $tags = array(
        'rrd_def' => 'DS:procs:GAUGE:600:0:U',
    );
    $fields = array(
        'procs' => $hrSystem[0]['hrSystemProcesses'],
    );

    data_update($device,'hr_processes',$tags,$fields);

    $graphs['hr_processes'] = true;
    echo ' Processes';
}

if (is_numeric($hrSystem[0]['hrSystemNumUsers'])) {
    $tags = array(
        'rrd_def' => 'DS:users:GAUGE:600:0:U'
    );
    $fields = array(
        'users' => $hrSystem[0]['hrSystemNumUsers'],
    );

    data_update($device,'hr_users',$tags,$fields);

    $graphs['hr_users'] = true;
    echo ' Users';
}

echo "\n";