CoachA burn-rate alert pages when the error budget is being spent faster than a stated multiple of the rate that would exactly exhaust it over the SLO’s period, measured over a long window and confirmed over a short one: for a 99.9% objective, Google’s SRE workbook recommends paging at 14.4 times over an hour (confirmed over five minutes) or 6 times over six hours (over thirty minutes).
| rule | feed stall | intermittent stalls | slow consumer | false pages a month |
|---|---|---|---|---|
| process heartbeat | never | never | never | 0 |
| data age above 5 s | 5 s | 5 s | 100 s | 18 |
| data age above 30 s | 30 s | never | 600 s | 1 |
| data age above 60 s | 60 s | never | 1 200 s | 0 |
| burn rate, 1 h and 6 h rules | 56 s | 191 s | 151 s | 1 |