<%NUMBERING1%>.<%NUMBERING2%>.<%NUMBERING3%> PRTG Manual: Application Server Health (Autonomous) Sensor

The Application Server Health (Autonomous) sensor monitors the health of the PRTG application server and checks various parameters that can affect the quality of the monitoring results.

Application Server Health (Autonomous) Sensor

Application Server Health (Autonomous) 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: Application Server Health (Autonoom)
  • French: État du serveur d’application (autonome)
  • German: Zustand des PRTG Application Servers (Autonom)
  • Japanese: アプリケーションサーバーの正常性(自律)
  • Portuguese: Funcionamento do servidor de aplicativos (autônomo)
  • Russian: Состояние сервера приложений (автономного)
  • Simplified Chinese: 应用程序服务器运行状况(自治)
  • Spanish: Salud de servidor de aplicaciones (autónomo)


Consider the following remarks and requirements for this sensor:



Performance impact

  • This sensor has a very low performance impact.


  • This sensor has predefined limits for several metrics.

Sensor creation

  • PRTG automatically creates this sensor. You cannot add it manually.

New UI and API

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:

  • appserverhealthsensor

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

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.



API Requests

The number of API requests

Average CPU Utilization (%)

The CPU usage of the PRTG application server process (%)

Core Messages

The number of messages that the PRTG application server receives from the PRTG core server

CPU Utilization of Garbage Collector (%)

The CPU usage of the PRTG application server garbage collector (%)


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

Dropped API Requests

The number of API requests per second that were dropped due to timeouts

i_round_blueThis channel has default limits:

  • Upper error limit: 5
  • Upper warning limit: 1

Free Memory (%)

The free system memory of the PRTG application server system (%)


The sums of the PRTG application server state as a value between 100% (healthy) and 0% (unhealthy). Investigate if values are frequently under 100%.

i_round_blueThis channel is the primary channel by default.

Heap Size (%)

The heap size of the memory that the PRTG application server uses (%)

Process Memory Usage

The memory usage of the PRTG application server process

Response Time

The average response time of the new API

Response Time 95th Percentile

The 95th percentile of the response time of the new API


The number of concurrently running routines in the PRTG application server


The number of active user sessions

Stack Size (%)

The relative stack size of the memory that the PRTG application server uses (%)


i_square_blueKNOWLEDGE BASE

I want to use the new UI and new API. What do I need to know?