Span total lantency

[dominicqi]

Does Jaeger has a metric record total latency since span.StartTime? or some ideas help get this?

[dosubot[bot]]

Hey there, @dominicqi! I'm here to help you out with any bugs, questions, or contributions you might have. Let's squash some bugs together! 🤖

Jaeger does not directly provide a metric for "total latency since span.StartTime." However, you can calculate the span duration, which is stored as an int64 in microseconds. This is done by converting the duration to microseconds and storing it as an int64 value ^[1][2].

To capture and export custom metrics related to span durations, you can use the following hooks or APIs:

1. gRPC/Protobuf API: Retrieve RED metrics via the jaeger.api_v2.metrics.MetricsQueryService gRPC endpoint.
2. HTTP JSON API: Used by the Jaeger UI's Monitor tab to populate metrics visualizations.
3. SpanMetrics Connector: Aggregates span data to produce RED metrics and exports them to a Prometheus-compatible metrics store.
4. /metrics Endpoint: Check if spans for specific services were received by accessing the /metrics endpoint from the admin port ^[3][4][5].

These tools allow you to capture and export custom metrics, including those related to span durations.

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