Dashboard An application (usually web-based) that provides a summary view of a service’s core metrics. Black-box monitoring Testing externally visible behavior as a user would see it. White-box monitoring Monitoring based on metrics exposed by the internals of the system, including logs, interfaces like the Java Virtual Machine Profiling Interface, or an HTTP handler that emits internal statistics. Monitoring Collecting, processing, aggregating, and displaying real-time quantitative data about a system, such as query counts and types, error counts and types, processing times, and server lifetimes. Even within Google, usage of the following terms varies, but the most common interpretations are listed here. There’s no uniformly shared vocabulary for discussing all topics related to monitoring. This chapter offers guidelines for what issues should interrupt a human via a page, and how to deal with issues that aren’t serious enough to trigger a page. Google’s SRE teams have some basic principles and best practices for building successful monitoring and alerting systems.
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