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DevOps & Automation · Foundational

Monitoring

Collecting, aggregating, and alerting on predefined metrics and checks to detect known failure conditions.

Definition

Monitoring answers whether a system is working against expected thresholds, using dashboards and alerts. It is a subset of observability and is the basis for SLO-based alerting and on-call response.

Example

An alert fires when free disk space on a database host drops below 10%.

Exam tip

Good alerting is symptom-based (user impact) rather than cause-based, to reduce noise.

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