intermediate
New Relic
Use a hosted APM and observability platform for traces, metrics, logs, synthetics, dashboards, and service maps.
New Relic provides hosted APM, infrastructure monitoring, logs, synthetics, and distributed tracing with a unified entity model. The Node agent auto-instruments HTTP, databases, and external calls.
| Capability | Interview angle | |------------|-----------------| | APM transactions | Slow endpoints, N+1 detection | | Service map | Dependency topology | | NRQL | Query metrics, events, logs | | Synthetics | Proactive uptime checks |
Compare with Datadog on pricing model, OTel support, and data residency. Useful when enterprises standardize on New Relic for full-stack visibility.
On interviews: agent overhead, custom attributes cardinality, and alert conditions vs Prometheus-style rules.
Common pitfalls: treating default dashboards as sufficient; high-cardinality custom attributes; ignoring browser RUM pairing.
The trade-off is integrated enterprise APM versus cost and agent coupling.
Checklist:
- Name services consistently across envs.
- Limit custom attribute cardinality.
- Pair APM with synthetics for SLIs.
- Align alerts to user journeys.