--- title: Metrics slug: edgemanager/lem-user-ui/product-features/edge-devices/edge-device-details/metrics description: Review metrics for activated edge devices. docTags: createdAt: 2022-08-02T17:50:15.000Z --- Once an edge device begins communicating with Litmus Edge Manager, the metrics of your edge device become available in the *Metrics* tab. The tab is divided into two sections: - **DeviceHub** - lists all devices connected to the edge device; shows their status and the number of tags - **Integration** - lists integration connectors defined for the edge device; shows their status, rate, and buffer size Refer to the following metrics you can refer to on the Litmus Edge Manager User UI's *Edge Devices Metrics* tab. ![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/OX0n4ysSynbWeX_uxLrsn_image.png "Edge Devices Metrics") | Section | Column | Description | | --------------------------- | ------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------- | | \[1] **Device Hub** | **Name** | The name of the device connected to the edge system. | | | **Tags** | The number of tags associated with the device. | | | **Success \| Error Rate (msgs/min)** | The rate of successful and error messages per minute for each device. | | | **Status** | The current status of the device connection.
* A green dot indicates a device is online. * A red dot indicates a device is offline. | | \[2] **Integration ** | **Name** | The name of the integration service used by the edge system. | | | **Rate (msgs/min) ** | The rate of messages per minute processed by the integration. | | | **Buffer Size ** | The current buffer size of the integration. | | | **Status ** | The current status of the integration.
* A green dot indicates online status. * A red dot indicates offline status. | ## Additional Metrics You can use additional metrics sources to set up an alert based on metrics collected by Litmus Edge Manager. The alert can trigger when a variable reaches a specific value or a set/interval of values. Only one metrics rule can be created per alert. See [Set Up Alert Triggers](docId\:ssMqiDTPoBpV95sc3lkaC) for more. :::hint{type="info"} **Note:** You can set up alert triggers for different metrics of your edge devices in the *Triggers* section in the *Alerts* module. Review the [Alerts Guides](docId\:Z6I7f1kbZSHNsn6FZliSe) for setting up alert triggers. ::: Refer to the following table for more information on additional metrics available for alerts template: | **Source** | **Metrics Name** | **Description / Purpose** | **Parameters** | | ----------- | ----------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------ | | Integration | Connector disk buffer | Monitor [Integration](docId\:Wpqo1fE02tmx3AsKewQU6) Connector disk buffer, which is used when the connector’s throughput is insufficient to handle all defined tags coming from Edge devices. | - Target Value in MB - Alert Delay in seconds | | Integration | Connector online status | Detect unplanned [Integration](docId\:Wpqo1fE02tmx3AsKewQU6) Connector disconnections. | * Alert Delay in seconds | | DeviceHub | DeviceHub (DH) online status | Detect unplanned disconnections of DeviceHub (DH) devices. | - Alert Delay in seconds | | DeviceHub | DeviceHub (DH) device data quality | Monitor the rate of low-quality (i.e. error) messages. A high rate of low-quality messages indicate a problem with either the physical device or the device driver. | * Target Value in msgs/minute * Alert Delay in seconds | | Edge Device | Edge Device online status | Detect unexpected disconnections of edge Devices. | - Alert Delay in seconds | | Edge Device | Edge Device license expiration | Detect when the license of an edge device has expired. | * Target Value in days * Alert Delay in seconds | | Edge Device | Edge Device free disk space | Monitor the available disk space of an edge device. | - Target Value in Percentage - Alert Delay in seconds | | Edge Device | Edge Device memory available | Monitor the available memory of an edge device | * Target Value in Percentage * Alert Delay in seconds | | Edge Device | Edge Device CPU Idle | Monitor the CPU usage of an edge device | - Target Value in Percentage - Alert Delay in seconds |