Introduction

A utility called nagiostats is included in the Nagios Core distribution. It is compiled and installed along with the main Nagios Core daemon. The nagiostats utility allows you to obtain various information about a running Nagios Core process that can be very helpful in tuning performance. You can obtain information either in human-readable or MRTG-compatible format.

Usage Information

You can run the nagiostats utility with the --help option to get usage information.

Human-Readable Output

To obtain human-readable information on the performance of a running Nagios Core process, run the nagiostats utility with the -c command line argument to specify your main configuration file location like such:

[nagios@lanman ~]# /usr/local/nagios/bin/nagiostats -c /usr/local/nagios/etc/nagios.cfg
...
CURRENT STATUS DATA
------------------------------------------------------
Status File:                            /usr/local/nagios/var/status.dat
Status File Age:                        0d 0h 0m 9s
Status File Version:                    3.0prealpha-05202006
Program Running Time:                   0d 5h 20m 39s
Nagios PID:                             10119
Used/High/Total Command Buffers:        0 / 0 / 64
Used/High/Total Check Result Buffers:   0 / 7 / 512
Total Services:                         95
Services Checked:                       94
Services Scheduled:                     91
Services Actively Checked:              94
Services Passively Checked:             1
Total Service State Change:             0.000 / 78.950 / 1.026 %
Active Service Latency:                 0.000 / 4.272 / 0.561 sec
Active Service Execution Time:          0.000 / 60.007 / 2.066 sec
Active Service State Change:            0.000 / 78.950 / 1.037 %
Active Services Last 1/5/15/60 min:     4 / 68 / 91 / 91
Passive Service State Change:           0.000 / 0.000 / 0.000 %
Passive Services Last 1/5/15/60 min:    0 / 0 / 0 / 0
Services Ok/Warn/Unk/Crit:              58 / 16 / 0 / 21
Services Flapping:                      1
Services In Downtime:                   0
Total Hosts:                            24
Hosts Checked:                          24
Hosts Scheduled:                        24
Hosts Actively Checked:                 24
Host Passively Checked:                 0
Total Host State Change:                0.000 / 9.210 / 0.384 %
Active Host Latency:                    0.000 / 0.446 / 0.219 sec
Active Host Execution Time:             1.019 / 10.034 / 2.764 sec
Active Host State Change:               0.000 / 9.210 / 0.384 %
Active Hosts Last 1/5/15/60 min:        5 / 22 / 24 / 24
Passive Host State Change:              0.000 / 0.000 / 0.000 %
Passive Hosts Last 1/5/15/60 min:       0 / 0 / 0 / 0
Hosts Up/Down/Unreach:                  18 / 4 / 2
Hosts Flapping:                         0
Hosts In Downtime:                      0
Active Host Checks Last 1/5/15 min:     9 / 52 / 164
   Scheduled:                           4 / 23 / 75
   On-demand:                           3 / 23 / 69
   Cached:                              2 / 6 / 20
Passive Host Checks Last 1/5/15 min:    0 / 0 / 0
Active Service Checks Last 1/5/15 min:  9 / 80 / 244
   Scheduled:                           9 / 80 / 244
   On-demand:                           0 / 0 / 0
   Cached:                              0 / 0 / 0
Passive Service Checks Last 1/5/15 min: 0 / 0 / 0
External Commands Last 1/5/15 min:      0 / 0 / 0
[nagios@lanman ~]# 

As you can see, the utility displays a number of different metrics pertaining to the Nagios Core process. Metrics which have multiple values are (unless otherwise specified) min, max and average values for that particular metric.

MRTG Integration

You can use the nagiostats utility to display various Nagios Core metrics using MRTG (or other compatible program). To do so, run the nagiostats utility using the --mrtg and --data arguments. The --data argument is used to specify what statistics should be graphed. Possible values for the --data argument can be found by running the nagiostats utility with the --help option.

Note: Information on using the nagiostats utility to generate MRTG graphs for Nagios Core performance statistics can be found here.