Paessler PRTG

Memory analysing with PRTG
...never run out of RAM again!


  • icon check white 2
    PRTG checks
    your memory
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    Scan your Windows, Linux,
    and Unix systems
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    PRTG alerts you before
    running out of RAM







What is RAM monitoring?

RAM Monitoring keeps a constant eye on the memory of all your systems. It helps identify resource-hungry applications and highly loaded servers. Thus, network bottlenecks and poor network performance can be prevented.


Address issues at an early stage with PRTG

At times, even simple applications may need significant memory and have an impact on overall server performance. With PRTG, you have a tool that automatically checks all properties of all devices such as the status of the main memory. You will be informed in good time before bottlenecks occur.

Your memory checker PRTG recognizes at an early stage issues that can impede workflows. PRTG memory monitoring sends a warning signal when the RAM usage of one or more servers is getting too high and threatens memory shortage. This allows you to take the appropriate, targeted steps to ensure network performance and avoid loss of data and downtime.


PRTG comes with preconfigured memory analysing sensors



 i How PRTG defines sensors

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, e.g. the traffic of a switch port, the CPU load of a server, the free space of a disk drive. On average you need about 5-10 sensors per device or one sensor per switch port.

View video (3:26 min.)



 i SNMP stands for Simple Network Management Protocol. Its usefulness in network administration comes from the fact that it allows information to be collected about network-connected devices in a standardized way across a large variety of hardware and software types. SNMP is a protocol for management information transfer in networks, for use in LANs especially, depending on the chosen version.
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WMI Memory Sensor

WMI Memory Sensor

The WMI Memory sensor monitors available (free) system memory on Windows systems using Windows Management Instrumentation (WMI).
It shows the available memory in percent and bytes.

SNMP Memory Sensor

SNMP Memory Sensor

The SNMP Memory sensor monitors the memory usage of a system via Simple Network Management Protocol (SNMP).
It can show the following:
- Available memory in bytes
- Available memory in percent
- Total memory

SNMP IBM System X Physical Memory Sensor

SNMP IBM System X Physical Memory Sensor

The SNMP IBM System X Physical Memory sensor monitors the memory modules in an IBM server via Simple Network Management Protocol (SNMP).
It shows the following:
- Condition of memory controller
- Power status (on or off)

SNMP HPE ProLiant Memory Controller Sensor

SNMP HPE ProLiant Memory Controller Sensor

The SNMP HPE ProLiant Memory Controller sensor monitors a memory controller in an HPE server via Simple Network Management Protocol (SNMP).
It shows the following:
- Error status of the controller
- Condition of the controller
- States and conditions of available modules.

SNMP Linux Meminfo Sensor

SNMP Linux Meminfo Sensor

The SNMP Linux Meminfo sensor monitors the memory usage of a Linux/Unix system using Simple Network Management Protocol (SNMP).
It shows the following :
- Available memory in absolute and percentage values
- Used physical memory (free memory plus buffer plus cache) in percent
- Free physical memory (free memory plus buffer plus cache) in bytes
- Used swap memory in percent
- Free swap memory in bytes
- Used memory on the whole system (physical memory plus swap) in percent
- Free memory on the whole system (physical memory plus swap) in bytes

SSH Meminfo Sensor

SSH Meminfo Sensor

The SSH Meminfo sensor monitors the memory usage of a Linux/Unix system using Secure Shell (SSH).
It shows the following:
- Available memory in bytes
- Available memory in percent

Your own memory sensor!

Your own memory sensor!

Create a memory sensor to fit your needs. Then customize PRTG to work effectively with your own particular circumstances.


quote steffen ille

“The greatest advantage of PRTG? You get to rest easy.“

Steffen Ille, Bauhaus-University of Weimar, Germany


Your memory monitoring at a glance

Set up PRTG in minutes and use it on almost any mobile device.


PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.



PRTG monitors these vendors and applications in one view!


vendors vm ware



Memory monitoring in PRTG works as follows:


PRTG makes your job easier

Our monitoring software frees you to focus on other tasks by promptly notifying you of potential issues.


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Save effort

PRTG gives you one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

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Save time

Getting started with PRTG is a breeze. Setting up or switching from another network monitoring tool is easy thanks to the auto-discovery and pre-configured device templates.

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Save money

80% of our customers report substantial cost savings with network monitoring. Your costs of licenses will likely pay for themselves within weeks.



Trusted by 500,000 users and recognized
by industry analysts as a leader


“Fantastic network and infrastructure monitoring solution that is easy to deploy and easier still to use. Simply the best available.”

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“Software is absolutely perfect, Support is superior. Meets all needs and requirements, this is a must have solution if you are needing any form of monitoring.”

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“The tool excels at its primary focus of being a unified infrastructure management and network monitoring service.”

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RAM monitoring offers the following advantages


  • Memory bottlenecks can be avoided.
  • Administrators can easily discover which applications unnecessarily consume memory.
  • With an impending overload, timely measures to ease the situation can be introduced, the allocation process informed, and memory scaled.

Notification system:
Be alerted quickly



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PRTG features a variety of alert types: E-mail, SMS, Pager, Apps, running an external application, etc. You can specify when and how each person is to be informed about network issues. To do so, you can add contacts and edit, delete, or pause your notifications at any time.

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The notification system is built into the monitoring software and is available at no extra charge. Because of its integrated quality, configuring the alert feature is done in just a few clicks.

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PRTG won't wait to let you know if your "house is on fire." You define your own thresholds. If these are crossed, you'll receive a corresponding notification. This means you can intervene promptly before clients or coworkers are aware of any problems.


How does memory monitoring with PRTG work?

PRTG uses SNMP and WMI to monitor the memory on Windows servers and computers. But PRTG is not a Windows-only monitoring software: Linux operating systems can also be monitored with an SNMP daemon or with native Linux sensors.

Administrators can set limits and configure alerts that are sent when memory usage on one or more servers is getting too high.


“Easy to implement and configure with good technical support.”

R. v. S., ICT Manager at Heinen & Hopman Eng BV


Create innovative solutions with Paessler’s partners

Partnering with innovative vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.


baramundi and PRTG create a secure, reliable and powerful IT infrastructure where you have everything under control - from the traffic in your firewall to the configuration of your clients.

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INSYS icom

With the combination of PRTG and Insys, the monitoring specialist Paessler and the industrial gateway manufacturer INSYS icom offer a practical possibility to merge IT and OT.

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Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.

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Also interesting:

Fortinet Monitoring: Check the status of your Fortinet products and get alerts as soon as your Fortinet solution 
identifies a security risk.

Printer Monitoring: With PRTG you know the status of every printer. See detailed printer error messages at a glance and get informed if printer replacement is necessary.

SAN Monitoring: PRTG offers extensive monitoring for your storage area networks (SAN), optimizes the performance and prevents data loss or hardware malfunctions.


Still not convinced?



More than 500,000 sysadmins love PRTG

Paessler PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.

Still not convinced?


Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.



Try Paessler PRTG for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free. Start now with your trial.




Network Monitoring Software - Version (February 14th, 2024)


Download for Windows and cloud-based version PRTG Hosted Monitor available


English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese


Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications

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