API latency spike
Affected: Visa API
Visa API p95 latency exceeded 1.2s for ~47 minutes after an upstream DNS resolver became briefly flaky. No data was lost or served incorrectly.
- Investigating
Elevated p95 latency detected on /api/visa. Investigating upstream DNS path.
- Identified
Cause identified β upstream DNS resolver returning slow responses for one zone. Failing over to the secondary resolver.
- Monitoring
Failover complete. Latency back within target. Monitoring for recurrence.
- Resolved
No recurrence over 14 minutes of monitoring. Incident resolved. Post-mortem to follow.