Does the tracing show only REST requests or something else?

Tracing is the process of tracking the execution of a program or interactions between components. It is not limited to just REST requests.

Tracing can include:

• Function and method calls within the application.
• Interactions between microservices, including REST, gRPC, message queues.
• Database queries.
• Events and logs related to data processing.
• System calls and input/output operations.

Thus, tracing is a broader mechanism that helps understand the flow of execution and interactions within a system, and REST requests are just one of the possible points of tracking.