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Aurelio, System Admin at Paessler AG

To install and work with PRTG Network Monitor, you need to meet the following requirements:

  • A current PC or server with at least a dual core CPU and minimum 2048 MB RAM memory.
  • Operating systems Microsoft Windows Server 2012 R2 (recommended), Windows Server 2012, Windows 8.1, Windows 8, Windows 7, and Windows 2008 R2 (all 32-bit or 64-bit) are officially supported. You can also use Windows Vista or Windows 2008, but we recommend that you don't use these systems, because there are known performance issues related to them.
  • Web browser to access the web interface. The following browsers are supported:
      • Google Chrome 42 or later (recommended)
      • Mozilla Firefox 37 or later
      • Microsoft Internet Explorer 10 or 11

Planning an Installation With Hundreds of Sensors or More?

The maximum number of sensors you can monitor with one installation of PRTG mainly depends on the monitoring technology and the monitoring intervals you use. Please see section Detailed System Requirements.

In general, consider the following rules:

  • SNMP V1 and V2 , Ping , Port , and HTTP
    These sensor types are recommended for scenarios with thousands of sensors.
  • SNMP V3
    You will be able to monitor about 5,000 SNMP V3 sensors with an interval of 60 seconds on a common two core computer, and about 10,000 sensors on a four core system (the main limiting factor is your CPU power).
  • WMI
    Try to keep the number of WMI sensors per probe below 120 sensors (with 60s interval), or 600 sensors (with 300s interval).
  • xFlow (IPFIX, NetFlow, sFlow, jFlow)
    Monitoring the maximum number of sensors depends on the traffic pattern, the number of xFlow packets per second received by the PRTG probe, as well as the performance of the probe system.
  • Packet Sniffer
    These sensors create the highest CPU load on the probe system. This technology is only recommended for monitoring of low traffic connections (<50 Mbit/s steady stream). When traffic is often over 10 Mbit/s a dedicated remote probe should be used.
  • VMware Monitoring
    Monitoring of VMware is limited to about 20 sensors at a 60 seconds monitoring interval, or 100 sensors at a 5 minutes interval. On probes running on Windows Server 2012 R2, you can use more VMware sensors. These limitations issue from the VMware platform. For details please see More section below and refer to the Knowledge Base article "Increasing Maximum Connections for VMware sensors".
  • Other sensor types
    The impact of a specific sensor type on performance is indicated by a color range when adding a sensor to a device. It ranges from dark green (very low impact) to bold red (very high impact).

To overcome any limitations mentioned above you should distribute the sensors over two remote probes or more.

We recommend using a dedicated physical machine to run both the PRTG core server and PRTG remote probes. For more information please see the Detailed System Requirements section.


Knowledge Base: Planning Large Installations of PRTG Network Monitor

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

Knowledge Base: Increasing Maximum Connections for VMware Sensors

Knowledge Base: Checklist for Running PRTG on VMware

Knowledge Base: Which ports does PRTG use on my system?

Knowledge Base: Which .NET version does PRTG require?


Introduction Topics

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