System requirements for PRTG
Recommended setup for most PRTG users
We recommend that you run the PRTG core server as well as all remote probes
- directly on x64 PC/server hardware
- on Windows Server 2019, Windows Server 2016, Windows Server 2012 R2, or Windows 10.
Note: .NET Framework 4.7.2 or later must be installed on your system.
There are many parameters that influence the performance and stability of PRTG, but for the majority of PRTG users, the following sizing recommendations for the hardware of the PRTG server work fine.
See also System Requirements for PRTG Remote Probes in the PRTG Manual.
per core server
core server hardware
|Disk space |
(1 year data retention)
|User accounts||Remote probes||Virtualization ||PRTG |
up to 1,000 sensors
|2 CPU Cores, 3 GB RAM||250 GB||< 30||< 30|
|1,000 – 2,500 sensors |
(~ 250 devices)
|PRTG 2500||3 CPU Cores, 5 GB RAM||500 GB||< 30||< 30|
|2,500 – 5,000 sensors |
(~ 500 devices)
|PRTG 5000||5 CPU Cores, 8 GB RAM||1 TB||< 20||< 30|
|5,000 – 10,000 sensors |
(~ 1,000 devices)
|PRTG XL1||8 CPU Cores, 16 GB RAM||2 TB||< 10|| |
|More than 10,000 sensors||We recommend that you set up additional PRTG core server installations and contact your Presales team.|
= not recommended * Make sure you assign sufficient dedicated resources to your virtual system or contact our Presales team directly.
= not officially supported: please contact our Presales team.
Note: Most PRTG users have 10 sensors per device on average. In most cases, for example, a 1,000 sensor license is therefore enough to monitor 100 devices.
If you exceed any of these recommendations, please contact our Presales team.
For more details about needed system resources, please see below:
Please note the following aspects that can affect performance:
- As a rule of thumb, we can say that typical PRTG installations almost never run into performance issues when they stay below 5,000 sensors, below 30 remote probes, and below 30 user accounts.
- In a cluster, the monitoring load doubles with each cluster node. The performance is accordingly divided in half with each additional cluster node. Therefore, in a single failover cluster setup that consists of two PRTG core servers that each work as a cluster node, please divide our recommended numbers from above in half.
- When you have more than 5,000 sensors, you should set 5-minute scanning intervals or longer instead of using 1-minute scaning intervals.
- Some sensor types create much more load than others. For example, Ping and SNMP sensors create much less load than complex sensors like xFlow (NetFlow, jFlow, sFlow, IPFIX) sensors, VMware sensors, Sensor Factory sensors, WMI sensors, or Syslog/Trap Receiver sensors, to name just a few examples.
- Try to use sensors with less than 50 channels. Note that sensors with more than 50 channels are not officially supported and can have a high impact on system performance.
- We recommend that you stay below 30 active user accounts for each PRTG core server. You can have more users if these do not all use the PRTG web interface at the same time (including public dashboards or 'Maps').
- Try to keep the usage of the following features down: many quickly refreshed dashboards (or 'Maps'), frequently generated, huge sensor reports, heavy usage of packet sniffing, Sensor Factory sensors and Toplists, frequent automatically scheduled auto-discoveries for large network segments, and constant queries of monitoring data via the application programming interface (API).
- Load balancing is possible using remote probes. To distribute load, you can set up multiple remote probes on different computers. For more information, see the PRTG Manual: Remote Probes and Multiple Probes and watch the video tutorial Distributed Monitoring with PRTG.
Please note the following aspects that can affect the stability of PRTG:
- Remote probes require a stable network connection between the PRTG core server and the remote probe. Unstable connections, for example via 3G or via satellite, might work. However, there have been situations where stable monitoring was not possible.
- Our general recommendation is to stay below 30 remote probes on one PRTG core server. PRTG still scales well up to 60 remote probes as long as you have less than 100 sensors per probe.
- The quality of your network also plays an important role. When monitoring via the User Datagram Protocol (UDP), for example, a high packet loss rate can lead to frequent timeouts. Remote probes that connect via unstable WAN connections can lead to delays as well.
Note: An internet connection is required for the license activation via HTTP or email.
The following Windows versions are officially supported for the PRTG core server service and the PRTG probe service. We recommend 64-bit (x64) operating systems.
- Microsoft Windows Server 2019
- Microsoft Windows Server 2016
- Microsoft Windows Server 2012 R2
- Microsoft Windows Server 2012
- Microsoft Windows 10
- Microsoft Windows 8.1
- Microsoft Windows 8
- Microsoft Windows 7*
- Microsoft Windows Server 2008 R2*
Note: Windows Servers in Core mode or Minimal Server Interface are not officially supported.
* On Windows 7 and Windows Server 2008 R2, you have to install the required .NET version manually. For more information, see the Knowledge Base: Which .NET version does PRTG require?
PRTG web interface
The following browsers (in order of performance and reliability) are officially supported for the web browser based primary user interface of PRTG at a screen resolution of 1024x768 pixels (more is recommended):
Google Chrome 72 or later (recommended)
Mozilla Firefox 65 or later
Microsoft Internet Explorer 11
Note: Other browsers and older browsers might not be able to access the PRTG web interface at all.
PRTG Desktop runs under all supported Windows and Mac versions. For detailed system requirements, see All PRTG Desktop downloads.
PRTG apps for iOS and Android
- Monitoring via the Simple Network Protocol (SNMP): The monitored devices must be equipped with SNMP v1, v2c, or v3, and an SNMP-compatible software must be installed on the device. SNMP must be enabled on the device and the machine running PRTG must be allowed to access the SNMP interface. For more information, see the PRTG Manual: Monitoring via SNMP.
- Monitoring via Windows Management Instrumentation (WMI): To use WMI monitoring, you need a Windows network. Host computers and client computers with Windows operating systems as specified above are officially supported. Do not use Windows Vista or Windows Server 2008 on host computers for WMI monitoring because both have WMI performance issues. For more information, see the PRTG Manual: Monitoring via WMI.
- Monitoring via xFlow (NetFlow, jFlow, sFlow, IPFIX): The device must be configured to send NetFlow (v5, v9, or IPFIX), sFlow (v5), or jFlow (v5) data packets to the probe system. For more information, see the PRTG Manual: Monitoring Bandwidth via xFlows.
- Monitoring via packet sniffing: Only data packets that pass the network card of the local machine can be analyzed. Switches with so-called 'monitoring ports' are necessary for network-wide monitoring in switched networks. For more information, see the PRTG Manual: Monitoring Bandwidth via Packet Sniffing.
Our Presales team is happy to assist you! Please write to [email protected]. If possible, describe your monitoring requirements in detail so that we can find the best person to help you. For larger installations, see Monitoring large IT infrastructures.