Telemetry channels
A Telemetry channel is a communication link between a queue manager on IBM MQ, and MQTT clients. Each channel might have one or more telemetry devices connected to it.
For messages flowing from IBM MQ to MQTT clients, messages are taken from the default MQTT transmit queue, and sent through the telemetry channel. Messages destined for specific MQTT clients are routed to them using their client identifiers.
Advanced option
Telemetry channels have an option which sets the maximum number of client connections that can be displayed in the Channel Status Content view. This option is called Max responses. The default value is 500. Consider configuring this option before you start your queue manager. If your queue manager is running, we must restart it to apply the advanced option changes.
To configure the maximum responses option, perform the following actions:
- Click Window > Preferences.
- Expand IBM MQ Explorer, then click Telemetry.
- In the Max responses field, type the number of client connections to display at any one time.
- Click OK.
Client connections on all telemetry channels up to the maximum response limit are shown in the Channel Status Content view. If client connections exceed this limit, a warning is displayed within the Content view. For example, if you set the maximum responses to 10 and you reach or exceed this number, the following warning is displayed: The display has been limited to the first 10 responses. Use a filter to select a subset of responses.
The Telemetry channel status window shows client connections specific to that channel. The maximum response option limit applies only to client connections on this channel.
Parent topic: MQ Telemetry objects Parent topic: Preferences for IBM MQ Explorer
Related tasks
- Create and configure a telemetry channel
- Start and stop a telemetry channel
- View the status of a telemetry channel
- Filtering Telemetry objects