# System Monitoring

Contains general statistics on authorized users, the number of VPN connections, CPU and disk usage, etc.

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This module allows you to view graphs about the state of UTM in **real-time**. The horizontal scale of the graph is always time (depending on the selected interval).

<p class="callout info">Statistics are stored for up to 90 days.  
In the event that a backup node in the [**Cluster**](https://docs.safedns.com/books/47-setup-server-management/page/high-availability) becomes active, statistics from the previously active node are not transferred to the new one but will continue to be stored for up to 90 days.</p>

##### System

Contains information:

- About the number of authorized users
- Processor load percentage (the sum of percentages from all cores is indicated)  
    Example:  
    There are eight cores in total, and the peak load value for one core is 100%. Thus, the maximum possible value on the graphs is 800%.
- The amount of RAM used in GB

##### Network

Contains summary information about incoming and outgoing traffic for a certain time, transmitted via UTM on all interfaces specified in the [**Network interfaces**](https://docs.safedns.com/books/45-setup-services/page/network-interfaces) section.

These stats can help you set up channel reservations, both static and dynamic [**channel aggregation**](https://docs.safedns.com/books/45-setup-services/page/channel-aggregation-failover).

##### Disks

Contains statistics on the volume of written and read the information (Disk graph) in a certain period of time and the number of disk accesses for the same period of time (I/O operations graph). Provides an estimate of disk usage. Information about free and used disk space is available in the [**Backup**](https://docs.safedns.com/books/47-setup-server-management/page/backup) section.

##### VPN

Contains information about the number of user connections via the L2TP/IPsec, PPTP, and IKEv2 protocols.

Instructions for connecting users to a VPN are available [**here**](https://docs.safedns.com/books/6-instructions-and-troubleshooting/chapter/instructions-for-creating-vpn-connections).