VA Recommended Service Level Objectives (SLO)¶
VA recommends that APIs should strive to meet these Service Level Objectives (SLOs) as a basic standard and to publish the actual SLO of your API with your API’s documentation.
Guidance
- Track and publish the actual SLO of your API with your API’s documentation.
| Metric | VA Recommended Service Level Objective |
|---|---|
| Availability (Production) | Within a rolling 30-day period, maintain 99.9% availability with no exclusions for planned downtime or holidays. |
| Availability (Test Environments) | Within a rolling 30-day period, maintain 99.0% availability with no exclusions for planned downtime or holidays. |
| Latency | Within a rolling 30-day period, 50% of requests respond under 500 ms, 90% under 1000 ms, and 99% under 5000 ms in production. VA API Standards recommend response times to be 1 second or less. |
| 5xx Error Rate | Within a rolling 30-day period, have a 0.5% Error Rate or less |