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Version: 2.11

Server Metrics

Server metric messages provide telemetry data from the NATS server for monitoring and performance analysis.

Overview​

Server metrics are published as events that can be subscribed to for real-time monitoring. These metrics help track:

  • Service response times
  • Request processing latency
  • System performance indicators
  • Resource utilization

Available Metrics​

Service Latency​

Measures the time taken to process service requests:

  • Request/response round-trip times
  • Processing latency distribution
  • Performance bottleneck identification

Subscribing to Metrics​

Metrics are published to specific subjects that follow the pattern:

  • $SYS.SERVER.METRIC.> - All server metrics
  • $SYS.SERVER.METRIC.SERVICE.LATENCY - Service latency metrics

Best Practices​

  • Use sampling to reduce metric overhead
  • Store metrics in time-series databases
  • Set up alerts for latency thresholds
  • Correlate metrics with system events