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How many entries/folders are necessary in \Monitoring Database\ folder



Is there a way to control the number of folders created in C:\ProgramData\Paessler\PRTG Network Monitor\Monitoring Database?

This folder is taking up most of the hard drive space for our PRTG server and I'm not finding much on how to manage the data in this location. How far back does it need to be kept? Is there a setting to limit the entries here.

Same question for the Configuration Auto-Backups.

administration drive-space prtg

Created on Feb 28, 2022 4:23:45 PM

1 Reply

Accepted Answer




Thank you for your message.

To limit the size of the Monitoring Database folder (which contains all sensors data), you have the possibility to reduce the data retention period by default configured to 365 days under Setup > System Administration > Core & Probes (/systemsetup.htm?tabid=4) | Historic Data Purging.

To do so, simply modify the values next to Historic sensor data and Configuration Auto-Backups (for the backup folder folder).

Regarding the latter, PRTG saves the configuration file every day and before each update. Therefore, you can reduce its retention period to a month or two depending on your needs.

Here is the manual regarding the Historic data retention settings: https://www.paessler.com/manuals/prtg/probes_settings#purging

Finally, I invite you to have a look at this KB article as well to reduce the disk usage further: https://kb.paessler.com/en/topic/64628-my-probe-system-is-running-out-of-disk-space-what-can-i-do.

If you have questions, do not hesitate.


Created on Mar 2, 2022 8:55:38 AM by  Florian Lesage [Paessler Support]

Last change on Mar 2, 2022 8:57:49 AM by  Florian Lesage [Paessler Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.