<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: Windows MSMQ Queue Length Sensor

The Windows MSMQ Queue Length sensor reads the number of messages in a Microsoft message queue of the parent device.

Windows MSMQ Queue Length Sensor

Windows MSMQ Queue Length Sensor

i_square_cyanFor a detailed list and descriptions of the channels that this sensor can show, see section Channel List.

Sensor in Other Languages

  • Dutch: Windows MSMQ wachtrijlengte
  • French: Windows MSMQ longueur de la file d'attente
  • German: Windows MSMQ Queue-Länge
  • Japanese: Windows MSMQ キュー長
  • Portuguese: Comprimento da fila MSMQ Windows
  • Russian: Длина очереди Windows MSMQ
  • Simplified Chinese: Windows MSMQ 队列长度
  • Spanish: Longitud de cola MSMQ Windows


Consider the following remarks and requirements for this sensor:



Performance impact

  • This sensor has a high performance impact. We recommend that you use no more than 200 of this sensor on each probe.

MSMQ service

  • This sensor requires that the Microsoft Message Queuing (MSMQ) service runs on both the probe system and the target system.
  • To enable the service, log in to the respective system and open the services manager (for example, via services.msc). In the list, find the respective service and set its Start Type to Automatic.
  • Depending on your Windows version, you might first need to install the MSMQ Server.

i_round_blueWhen installing MSMQ Server, make sure that you install it including the Directory Service. Depending on your Windows installation, this might have a different name, such as:

  • MSMQ Active Directory Domain Service Integration
  • Directory Service Integration
  • Active Directory Integration

i_square_cyanFor more information, see the Knowledge Base: How do I activate Message Queuing in my Windows installation?

.NET 4.7.2 or later

  • This sensor requires .NET 4.7.2 or later from Microsoft on the probe system. In a cluster, install it on every cluster node. If the sensor shows the error PE087, additionally install .NET 3.5 on the probe system.

i_round_redIf the framework is missing, you cannot create this sensor.

i_square_cyanFor more information, see the Knowledge Base: Which .NET version does PRTG require?

Windows Server

  • We recommend Windows Server 2016 on the probe system for best performance of this sensor.


  • This sensor requires credentials for Windows systems.
  • We recommend that you use Windows domain credentials.

i_round_redIf you use local credentials, make sure that the same Windows user accounts (with the same user name and password) exist on both the probe system and the target system.

  • Otherwise, the sensor cannot correctly connect.


  • This sensor cannot monitor subqueues.

Add Sensor dialog

  • If no message queues are available in the Add Sensor dialog, you see a corresponding message.


  • This sensor supports IPv6.

Knowledge Base

Hosted probe

i_podYou cannot add this sensor to the hosted probe of a PRTG Hosted Monitor instance. If you want to use this sensor, add it to a remote probe device.

Basic Sensor Settings

Basic Sensor Settings

Basic Sensor Settings

The sensor has the following default tags that are automatically predefined in the sensor's settings when you add the sensor:

  • ptfsensor

i_square_cyanFor more information about basic sensor settings, see section Sensor Settings.

Sensor Settings

Sensor Settings

Sensor Settings



Message Queue

The name of the message queue that this sensor monitors.

Message Queue Type

The type of the message queue that this sensor monitors.

Minimum Message Age

Optionally define an age in minutes that the message must be for the sensor to count it. If you set a minimum message age, the sensor does not regard messages that are younger than this age. If you leave this field empty, the sensor does not check for the message age. Enter an integer or leave the field empty.

If Value Changes

Define what the sensor does when its value changes:

  • Ignore (default): Do nothing.
  • Trigger 'change' notification: Send an internal message that indicates a change.
    i_round_blueIn combination with a change trigger, you can use this to trigger a notification if a change occurs.

Debug Options

Debug Options

Debug Options



Result Handling

Define what PRTG does with the sensor result:

  • Discard result (default): Do not store the sensor result.
  • Store result: Store the last sensor result in the \Logs\sensors subfolder of the PRTG data directory on the probe system. The file names are Result of Sensor [ID].txt and Result of Sensor [ID].Data.txt. This setting is for debugging purposes. PRTG overwrites these files with each scanning interval.

i_round_blueIn a cluster, PRTG stores the result in the PRTG data directory of the master node.

Sensor Display

Sensor Display

Sensor Display



Primary Channel

Select a channel from the list to define it as the primary channel. In the device tree, PRTG displays the last value of the primary channel below the sensor's name. The available options depend on what channels are available for this sensor.

i_round_blueYou can set a different primary channel later by clicking b_channel_primary below a channel gauge on the sensor's Overview tab.

Graph Type

Define how this sensor shows different channels:

  • Show channels independently (default): Show a graph for each channel.
  • Stack channels on top of each other: Stack channels on top of each other to create a multi-channel graph. This generates a graph that visualizes the different components of your total traffic.
    i_round_redYou cannot use this option in combination with manual Vertical Axis Scaling (available in the channel settings).

Stack Unit

This setting is only visible if you select Stack channels on top of each other above.

Select a unit from the list. PRTG stacks all channels with this unit on top of each other. By default, you cannot exclude single channels from stacking if they use the selected unit. However, there is an advanced procedure to do so.

Inherited Settings

By default, all of these settings are inherited from objects that are higher in the hierarchy. We recommend that you change them centrally in the root group settings if necessary. To change a setting for this object only, click b_inherited_enabled under the corresponding setting name to disable the inheritance and to display its options.

i_square_cyanFor more information, see section Inheritance of Settings.

Channel List

i_round_blueWhich channels the sensor actually shows might depend on the target device, the available components, and the sensor setup.




In the channel table on the Overview tab, this channel never shows any values. PRTG uses this channel in graphs and reports to show the amount of time in which the sensor was in the Down status

Execution Time

The execution time


The total number of messages in the queue

i_round_blueThis channel is the primary channel by default.


i_square_blueKNOWLEDGE BASE

How do I activate Message Queuing in my Windows installation?

Which .NET version does PRTG require?

What security features does PRTG include?