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This final lesson brings together everything covered in the course into a comprehensive set of best practices for monitoring and observability on Google Cloud Platform. Effective monitoring is not just about deploying tools — it requires a thoughtful strategy that aligns with your organisation's reliability goals, operational maturity, and team structure.
Google's SRE handbook defines four key metrics that every service should monitor. These "golden signals" provide a comprehensive view of service health:
| Signal | Description | GCP Metric Example |
|---|---|---|
| Latency | How long it takes to serve a request | run.googleapis.com/request_latencies |
| Traffic | How much demand is being placed on the system | run.googleapis.com/request_count |
| Errors | The rate of failed requests | Request count filtered by response_code_class != "2xx" |
| Saturation | How full the most constrained resource is | compute.googleapis.com/instance/cpu/utilization |
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