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DevOps & Automation · Intermediate

Synthetic Monitoring

Proactively testing an application by running scripted transactions or probes from external locations at regular intervals.

Definition

Synthetic checks detect outages and performance regressions even when there is no real traffic, such as overnight. Examples include uptime checks, API probes, and scripted browser journeys. Cloud services include CloudWatch Synthetics canaries, Azure availability tests, and Google Cloud uptime checks.

Example

A CloudWatch Synthetics canary logs in to the web app every 5 minutes and alarms if login fails.

Exam tip

Synthetic = simulated traffic; RUM = real user traffic. Questions about off-hours detection point to synthetic monitoring.

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