Google Cloud Functions can be monitored and debugged in a production environment using Google’s operations suite, formerly Stackdriver. This includes Logging and Error Reporting for identifying issues, and Debugger for inspecting the state of functions at any code location without stopping or slowing down your applications.
Logging provides real-time log management and analysis, capturing logs from Cloud Functions automatically. It allows filtering and searching to quickly find specific logs.
Error Reporting aggregates and displays errors produced by Cloud Functions, helping identify new issues as they arise. It notifies you when new error types are detected.
Debugger lets you inspect the state of your application at any code location in real time, providing full stack traces and variable inspection.
For performance insights, use Trace which collects latency data from your app and displays it in near real-time in the Google Cloud Console.