To monitor the integration of card products with remote banking services via a message broker, it is necessary to propose control metrics. Choose the most comprehensive set: - Processing time + errors + delays + data volume - Only the number of messages per second - Connection status and log volume - Endpoint availability and uptime

The most comprehensive and informative set of metrics for monitoring the integration of card products with remote banking services through a message broker would be:

• Message processing time — allows assessing performance and identifying bottlenecks.
• Errors — record failures and issues in processing.
• Delays — help understand how quickly messages pass through the system.
• Data volume — shows load and helps plan scaling.

This set provides a comprehensive view of the integration status, unlike narrowly focused metrics such as only the number of messages or only the connection status.