指标上报
OpenTelemetry
Prometheus
最佳实践:https://prometheus.io/docs/practices/naming/
常见公式:https://prometheus.io/docs/prometheus/latest/querying/functions/
histogram
summary
counter
gauge
Metric:发现问题 Log: 具体的错误现场 Trace:追踪链路、并发、根因、性能