PRTG 9 Manual: Detailed System Requirements

This section lists different aspects of system requirements for PRTG:


Supported Operating Systems

The 32-bit and 64-bit versions of the following operating systems are officially supported for PRTG Core Service and Probe Service (Intel x86/x64 architectures only):

  • Microsoft Windows XP SP2 or later
  • Microsoft Windows Server 2003 SP1 or later
  • Microsoft Windows Vista*
  • Microsoft Windows Server 2008*
  • Microsoft Windows Server 2008 R2
  • Microsoft Windows 7

* For performance reasons, we recommend to not use Windows Vista or 2008 R1, especially when monitoring via Windows Management Instrumentation (WMI). Using these operating systems you will only be able to use a limited number of WMI sensors! For detailed information please see More section below.

Some sensor types need the Microsoft .NET Framework to be installed on the computer running the PRTG probe: Either on the local system (on every node, if in a cluster), or on the system running a remote probe. Depending on the sensor type, the required version is 2.0 or 3.0.

Hardware Requirements

Hardware requirements for PRTG Core Service and Probe Service mainly depend on the sensor types and intervals used. The following values are provided as reference for common usage scenarios of PRTG 8 (based on a default sensor interval of 60 seconds).

  • CPU
    An average PC built in 2007 can easily monitor 1,000 sensors (see sensor type specific notes below). PRTG supports native x86 architectures.
  • RAM memory
    Minimum requirement: 1024 MB RAM. You will need about 150 KB of RAM per sensor.
  • Hard Disk Drive
    You will need about 200 KB of disk space per sensor per day (for sensors with 60 second interval).
  • Internet connection
    An internet connection is required for license activation (via HTTP or email).

There are also non-hardware dependent limitations for some sensor types, e.g. WMI and SNMP V3 sensors. These limitations can be overcome by distributing the sensors across multiple remote probes. If you plan installations with more than 500 to 1,000 sensors, or more than 10 Packet Sniffer or xFlow (NetFlow, sFlow) sensors, please consult the site planner tool linked in the More section below.

Sample Configurations

The sample configurations in the table below will give you an overview of the hardware requirements for PRTG, based on your configuration.


Large Installation A

Large Installation B

Netbook Installation


DELL Alienware

DELL PowerEdge 2900 III

DELL Inspiron Mini 10


Intel Core2 Quad-Core
2.6 GHz

Intel Xeon Quad-Core
1.87 GHz

Intel Atom Z520
1.33 GHz


8 GB

16 GB

1 GB

Operating System

Windows 7 64-Bit

Windows 2003 64-Bit

Windows XP 32-Bit


20,000 SNMP
100 Other

20,000 SNMP

600 SNMP
750 WMI

Installation Corresponds To

400 switches à 48 ports

400 switches à 48 ports

24 switches à 25 ports
+ 30 Windows server

Scanning Interval

1 minute

1 minute

5 minutes

Number of Probes




Average CPU Load
While Monitoring*

3 %

20 %

35 %

Average CPU Load
While Generating Reports*

20 %

30 %

85 %

Average Memory Used

3 GB

3.5 GB

260 MB

Average Data Written to Disk Per Year

800 GB

800 GB

55 GB

Average Network Load

80 kbit/s

550 kbit/s

150 kbit/s

* CPU load is higher while users are accessing the web interface.

Running PRTG on Virtual Machines

PRTG core server as well as PRTG probe can be run on virtualized platforms. The following platforms were tested successfully:

VM Technology

Client OS

VMware ESX/ESXi (version 3.5 and VSphere 4)

Windows XP, Windows 2003 SP1 or later(32/64 bit), Windows Vista, Windows 7 (32/64 bit), Windows 2008 (32/64 bit)

VMware Server 2.0

Windows XP, Windows 2003 SP1 or later(32/64 bit), Windows 2008

XEN Server 5.0

Windows XP

Parallels Virtuozzo Containers

Windows 2003 Server SP1 or later (32/64 bit)

Cloud Hosting Platforms (Amazon EC2, TheRackspaceCloud, and others)

Windows Server 2003 SP1 or later, Windows Server 2008

Note: When monitoring more than 1,000 sensors we recommend to use dedicated real hardware instead of a virtual machine. In our experience, this improves performance a lot.

Note: When running PRTG on a virtual machine, do not use dynamic resource allocation, but please make sure that full resources are available to the virtual machine at any time. In our experience, dynamic resource allocation is simply not working efficiently for a monitoring software and can therefore lead to massive performance issues.

Web Browser Requirements

The following browsers are officially supported by the PRTG web interface (in order of performance and reliability):

  • Google Chrome 10 or later (recommended)
  • Mozilla Firefox 4 or later
  • Microsoft Internet Explorer 9

Note: Microsoft Internet Explorer versions 8 and earlier as well as mobile browsers cannot display the full featured Ajax web interface. Using these browsers, you can access the feature-limited HTML web interface, which does not require CSS or Javascript capability.

PRTG's web interface makes heavy use of Javascript and AJAX. We found that for some functions Chrome is up to 10 times faster than Internet Explorer, and 3 to 5 times faster than Firefox.

Internet Explorer version 8 or higher has to be installed on the system running a PRTG probe, so PRTG's HTTP Full Web Page Sensor sensor can work correctly.

Requirements for Monitored Devices

  • SNMP monitoring
    The monitored device(s) must be equipped with SNMP Version 1, 2c or 3 (i.e. a SNMP-compatible software must be installed on the device). SNMP must be enabled on the device and the machine running PRTG must be granted access to the SNMP interface.
  • WMI monitoring
    In order to use WMI (Windows Management Instrumentation) monitoring you will need a Windows network. For client PCs monitored with WMI only Windows XP and later are officially supported (XP, 2003, Vista, 2008, etc.). Windows 2000 is not officially supported. Please do not use Windows Vista or Windows 2008 R1 for WMI monitoring (they both have WMI performance issues).
  • xFlow (NetFlow, sFlow) monitoring
    The device must be configured to send NetFlow data packets (NetFlow version 5 or 9) or sFlow packets (version 5) to the machine running the PRTG probe.
  • Packet Sniffer monitoring
    Only data packets passing the local machine's network card can be analyzed. Switches with so-called 'monitoring ports' are necessary for network-wide monitoring in switched networks.

Requirements for the Enterprise Console

The optional PRTG Enterprise Console runs under all Windows versions XP or later. It has a built-in webkit browser engine and requires no specific browser installed on the system.

Requirements for HTML GUI

The feature-limited HTML web interface is optimized for low bandwidth and mobile access. It has been designed for and tested with iOS (iPhone, iPad), Android, Blackberry, Windows Mobile, Opera Mini, and even Internet Explorer 5/6/7/8.

Requirements for Smart Phones

The optional smart phone apps for iOS require firmware 3.0 (or later). For Android devices, OS 2.1 through 3.0 are recommended. For more information, please see Smart Phone Apps. The 'Mini HTML' interface can be used on most phones with a browser. We successfully tested it on Symbian, Blackberry, Windows, Android, and iOS devices.


CEO's Blog: Don't Use Windows Vista And Windows 2008 R1 for Network Monitoring via WMI!


Paessler Website: Paessler PRTG Site Planner Tool


Knowledge Base: How can I speed up PRTG—especially for large installations?



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