Burn rate.

also: burn rate alerting · burn rate alert · burn rate alerts · burn-rate

How fast the error budget is being spent relative to the even pace; 14.4× for an hour burns 2% of a 30-day budget.

the two-minute refresher

Threshold alerts (error rate > 0.1%) fire on every blip and lack urgency.
14.4× over 1 hour (2% of budget) → page now. 6× over 6 hours (5%) → also a page in the SRE Workbook's example (many teams route it to business hours).
1× over 3 days → ticket or weekly review (the Workbook lists it as a ticket); a 3× over a day tier is a common local addition.
Alerts track SLO impact, not raw noise.

also: burn rate alerting · burn rate alert · burn rate alerts · burn-rate

How fast the error budget is being spent relative to the even pace; 14.4× for an hour burns 2% of a 30-day budget.

Threshold alerts (error rate > 0.1%) fire on every blip and lack urgency.
14.4× over 1 hour (2% of budget) → page now. 6× over 6 hours (5%) → also a page in the SRE Workbook's example (many teams route it to business hours).
1× over 3 days → ticket or weekly review (the Workbook lists it as a ticket); a 3× over a day tier is a common local addition.
Alerts track SLO impact, not raw noise.