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Some key-metrics are important to track through the process of taking code changes and getting them to production for users to enjoy. Knowing the normal operating state of your system's pipeline is crucial and it takes time to set up a monitoring tool. You'll be able to give more accurate estimates of the number of resources your systems use. This is one of the ways you can make sure that your metrics are relevant to the system you're thinking of are truly impactful to the the system.