SRE Alerting Strategy and Noise Reduction 3

Question 1

According to the Google SRE book, which question should every alert be able to answer 'yes' to in order to justify its existence?

Accepted Answer

Is this alert actionable—does a human need to do something in response right now?

Answer

The Google SRE book's core alerting principle states that every page-worthy alert must require immediate human action; alerts that don't need a human response right now should be tickets or removed entirely.

Question 2

What is the 'Four Golden Signals' framework for monitoring and alerting in distributed systems?

Accepted Answer

Latency, Traffic, Errors, and Saturation—the key indicators of service health

Answer

The Four Golden Signals (Latency, Traffic, Errors, Saturation) defined in the Google SRE book provide a minimal but comprehensive framework for alerting on the health of any user-facing service.

Question 3

How does error budget burn rate directly influence alerting strategy?

Accepted Answer

Burn rate determines the appropriate alert window: fast burn triggers short-window alerts; slow burn triggers long-window alerts

Answer

Fast error budget burn (e.g., 14x over 1 hour) warrants short-window urgent alerts, while slow burn (e.g., 1x over days) warrants longer-window lower-priority alerts—matching alert urgency to actual impact speed.

Question 4

What is a 'phantom alert' in SRE monitoring practice?

Accepted Answer

An alert that fires based on stale or delayed metrics and resolves itself before an engineer can respond

Answer

Phantom alerts fire due to data pipeline delays or metric staleness, creating false urgency that resolves on its own—they erode trust in the alerting system and contribute to engineers ignoring alerts.

Question 5

What is the recommended strategy for handling alert noise during a known, expected maintenance window?

Accepted Answer

Silence or suppress alerts for the affected services for the duration of the maintenance window

Answer

Silencing alerts for known maintenance windows prevents noise that would otherwise desensitize engineers, while ensuring the silence is time-bounded and explicitly tied to the maintenance event for accountability.

(SRE) Site Reliability Engineering Foundation Certification Practice Test

(SRE) Site Reliability Engineering Foundation Certification Practice Test

SRE Alerting Strategy and Noise Reduction 3