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    Are you sure about this one "The backend only logs unusual error responses"? My experience says that's not good enough. Having an error in your log without details about what lead up to that point is often useless for troubleshooting. Commented May 1, 2023 at 15:53
  • I've an article of a guy who said that only errors that would return an internal server error were logged and that the rest was handled by telemetry. For example a 404 is not something we may troubleshoot, same for 409 (id collision, already existing resource etc). I'll search the ref today ... Commented May 2, 2023 at 4:22
  • In that case, you probably need to define what you mean by "telemetry" and "logging", and why you think building a logging solution without a telemetry one is a good idea. Commented May 2, 2023 at 8:46
  • Here, I see Logging as writing unexpected behaviors of the backend (status >=500 for sure but maybe others, I need to check in detail here) and use it to identify any anomaly of the implementation. I don't say building the solution without telemetry is a good thing cause I don't know telemetry... Talking about it, I'm just figuring out that telemetry is divided into logs, traces, and metrics <learn.microsoft.com/en-us/azure/architecture/microservices/…>, but I was thinking about metrics I guess. I probably need some good readings. Commented May 2, 2023 at 10:06
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    With respect to pricing you may want to take a look at the websites of the "big players" in the logging/monitoring space (NewRelic, DataDog etc) a number of them have free plans for small data volumes - you may be able to get the power those tools provide without having to shell out anything. Commented May 3, 2023 at 12:27