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Check Windows Performance Monitor Counters

2 votes
Current Version
Last Release Date
Compatible With
  • Nagios 1.x
  • Nagios 2.x
  • Nagios 3.x
  • Nagios 4.x
  • Nagios XI
Network Monitoring Software - Download Nagios XI
Log Management Software - Nagios Log Server - Download
Netflow Analysis Software - Nagios Network Analyzer - Download
Plugin for Nagios that allow to check a group of Windows performance counters given in a xml file.

It checks value of performance counters based on thresholds specified and returns exit and performance data in Nagios format.
Check out on GitHub for more detailed information:


Preconfigured XML files

In downloaded zip package, there are several .xml files preconfigured:

* PerfMonNetwork.xml: Performance Counters to check network load.

* PerfMonPhysicalDisk.xml:Performance Counters to check physical Disk load.

* PerfMonCPU.xml: Performance Counters to check CPU load.

* PerfMonMem.xml: Performance Counters to check Memory (RAM and virtual) load.

* PerfMonMSQL.xml: Performance Counters to check Microsoft SQL Server.

* PerfMonWebService.xml: Performance Counters to check Microsoft IIS Web Service.

* PerfMonPrinter.xml: Performance Counters to check Microsoft Print Server.

* PerfMonCB.xml: Performance Counters to check Microsoft Connection Broker Server.


* Example CPU counters: check_win_perfmon.exe -f PerfMonCPU.xml

OK - All performance counters between range | 'ProcessorTime'=3%;95;100;0;100 'UserTime'=2%;85;95;0;100 'DPCTime'=0%;15;20;0;100 'InterruptTime'=0%;10;15;0;100 'ProcessorQueueLength'=0;4;8;;

* Example Memory counters: check_win_perfmon.exe -f PerfMonMem.xml

OK - All performance counters between range | 'CommittedBytesInUse'=57%;80;90;0;100 'AvailableMBytes'=4083MB;1024;512;0;8192 'AvailableMBytesPercent'=50%;13;6;0;100 'FreeSystemPageTableEntries'=2867405056;5000;4000;; 'PagesSec'=0;5000;6000;;

* Example Physical Disk counters: check_win_perfmon.exe -f PerfMonPhysicalDisk.xml

OK - All performance counters between range | 'AvgDiskSecTransfer'=0.0002s;0.04;0.05;; 'CurrentDiskQueueLength'=0;32;40;; 'AvgDiskSecWrite'=0.0002s;0.04;0.05;0; 'AvgDiskSecRead'=0s;0.04;0.05;0; 'IdleTime'=100%;20;15;0;100

* Example Network counters: check_win_perfmon.exe -f PerfMonNetwork.xml

OK - All performance counters between range | 'BytesTotalSec'=1885.7051B;15728640;17825790;0;20971520 'BytesTotalSecPercent'=0%;75;85;0;100 'OutputQueueLength'=0;2;3;;

* Example Microsoft SQL counters: check_win_perfmon.exe -f PerfMonMSQL.xml

OK - All performance counters between range | 'TotalServerMemory'=8381528KB;14680060;16252930;0;16777220 'TotalServerMemoryPercent'=50%;88;97;0;100 'TargetServerMemory'=8388608KB;14680060;16252930;0;16777220 'TargetServerMemoryPercent'=50%;88;97;0;100 'PageReadsSec'=0;90;100;; 'PageWritesSec'=0;90;100;; 'BufferCacheHitRatio'=100;95;90;0;100 'BufferCacheHitRatioPercent'=100%;95;90;0;100 'PageLifeExpectancy'=109982.6641;400;300;; 'LazyWritesSec'=0;15;20;; 'FreeListStallsSec'=0;1;2;; 'MemoryGrantsPending'=0;1;2;; 'BatchRequestsSec'=16.6571;1000;2000;; 'UserConnections'=115.3333;600;700;; 'LockWaitsSec'=0;1;2;; 'ProcessesBlocked'=0;1;2;;


check_win_perfmon.exe [parameters]:

-f, --xmlFile (Default: perfcounts.xml) XML file with performance counters configuration.

-s, --maxSamples (Default: 3) Amount of samples to take from perfmon.

-t, --timeSamples (Default: 1000) Time between samples in ms.

-v, --verbose Verbose output for debuging.

Example:check_win_perfmon.exe -f PerfMonMem.xml -s 10 -t 2000

Check performance counters of PerfMonMem.xml taking 10 samples with 2 sec interval.

Creating new XML files to check your own performance counters

You can set up your own performance counters adding them to xml files or creating new ones.

To list available performance counters on a system in a PowerShell console type:

In PowerShell

#Get all counters
Get-Counter -ListSet | Select-Object -ExpandProperty Counter
#Get specified counter
Get-Counter -ListSet processor | Select-Object -ExpandProperty Counter

You can check performance counters on a Windows system: Start Menu->Administrative Tools->Performance Monitor->Clic on plus symbol

XML Format

In a XML file, for each counter, we need to set:

* category: Category of performance counter
* name: Name of the performance counter.
* instance: Instance of performance counter. Some performance counter does not have instance, in this case the value must be: none. This value can be auto for Network category, program will autodetect best interface to check. This value can be auto for Physical Disk category too, program will autodetect physical disk 0.
* friendlyname: name of performance counter which program returns in output.
* units: units program returns in output.
* warning: Warning threshold for performance counter.
* critical: Critical threshold for performance counter.
* min: minimum value of performance counter. If you do not know the minimum value, it has to be: none.
* max: maximum value of performance counter. If you do not know the maximum value, it has to be: none. This value can be auto for Memory category and Network Interface/Adapter category, program will detect the amount of memory installed on system or network interface speed on bytes/s.

If max and min are specified, program returns one more result for percent value. Max and min must have different value.

System Load
I tried to minimize system load during program execution, but check performance counters allways has an impact on system performance. Program execution has a 5% of CPU usage on old systems and a minimun impact on modern servers. The more performance counters you check at a time, the more system impact.


Values and counters are based on System Center Operations Manager checkins. You can check it out here http://mpwiki.viacode.com/default.aspx?g=posts&t=219816

Values and counters for Microsoft SQL are based on articles from:



Updated tresholds based on the amazing tool PAL created by Clint Huffman from Microsoft.
Reviews (1)
byjotta, January 17, 2018
1 of 1 people found this review helpful
Thank you for this great plugin. I really appreciate your work and especially viariability. It is amazing to know that I can add almost any performance counter by simple XML file and use your script with Nagis.

I have a question related to the Network performance check. The warning and Critical threshold you have set in your XML file seems to have quite low values to me. If I count with 1Gb interface than your warning threshold is just around 13% of maximum utilization.

Maybe I got your thresholds wrong, please can you confirm my thoughts or explain why you used these values.

Thank you, Jakub
Owner's reply

Hi Jakub! You are right, my network thresholds are very low because my network is very slow. By the way I have added auto detection for network bandwidth in 1.3 version.