# SLO and Alerting

- Canonical URL: https://docs.fairvisor.com/docs/reference/slo-alerting/
- Section: docs
- Last updated: n/a
> Baseline SLOs and practical alert rules for Fairvisor Edge.


## Suggested SLOs

- Decision availability (`/v1/decision` usable): >= 99.9%
- Readiness (`/readyz`): >= 99.95%
- Reject classification accuracy: no unexplained reason spikes
- SaaS connectivity (for SaaS mode): target >= 99.0%

## Core alerts

### 1) Reject spike

```yaml
- alert: FairvisorRejectSpike
  expr: rate(fairvisor_decisions_total{action="reject"}[5m]) > 50
  for: 10m
  labels:
    severity: warning
  annotations:
    summary: "Fairvisor reject rate spike"
```

### 2) No bundle loaded

```yaml
- alert: FairvisorNoBundleLoaded
  expr: rate(fairvisor_decisions_total{action="reject",reason="no_bundle_loaded"}[5m]) > 0
  for: 2m
  labels:
    severity: critical
```

### 3) SaaS disconnected

```yaml
- alert: FairvisorSaasDisconnected
  expr: fairvisor_saas_reachable == 0
  for: 5m
  labels:
    severity: warning
```

### 4) Descriptor mismatch regression

```yaml
- alert: FairvisorDescriptorMissing
  expr: rate(fairvisor_descriptor_missing_total[5m]) > 0
  for: 10m
  labels:
    severity: warning
```

## Recommended dashboard panels

- reject rate by reason
- allow/reject split
- retry-after bucket distribution
- saas reachable state
- top descriptor-missing keys