
Sentry Performance Units vs Spans: What Changed?
Learn when Sentry performance units still apply, how legacy transactions were counted, and why current span quotas need a different estimate.

Learn when Sentry performance units still apply, how legacy transactions were counted, and why current span quotas need a different estimate.

Monitor LLM call latency in production workflows with traces, model percentiles, token usage, costs, errors, and workflow context.

Use Node.js monitorEventLoopDelay and eventLoopUtilization to measure event-loop lag, export useful metrics, and debug blocking production code.
Your API threw a 500 at 3 AM. A systematic approach to diagnose, trace, and fix production API errors without the panic and guesswork.
Get production visibility without the Datadog bill. Free-tier APM setup with OpenTelemetry for freelancers and small teams who need traces, not invoices.

Use Node.js application performance monitoring to connect request traces, event loop health, dependencies, releases, and runtime state.

Debug production issues 10x faster with distributed tracing. Track requests across microservices, find bottlenecks, and resolve errors without log diving.