What should be monitored to ensure the MID server is functioning correctly?

Monitoring the heartbeat probe is essential for ensuring that the MID server is functioning correctly. The heartbeat probe is a fundamental mechanism used by ServiceNow to check the operational status of the MID server. It regularly sends signals between the MID server and the ServiceNow instance, confirming that the MID server is alive and able to communicate with the instance. If the heartbeat probe fails, it indicates that there could be issues with the MID server, such as connectivity problems, configuration errors, or even potential outages, prompting an immediate investigation to resolve any underlying issues.

While monitoring database size, network speed, and CPU usage can provide useful insights into the overall performance of the infrastructure, these metrics do not specifically confirm the operational status of the MID server itself in the context of ServiceNow Discovery. Therefore, focusing on the heartbeat probe is the most direct way to ensure that the MID server is functioning as expected.