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Merge branch 'pratik/otel-phase9-metric-gap-fill' into pratik/otel-phase10-workload-validation

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Brings the 09-data-collection-reference doc-sync (rpc_in_flight_requests entry)
forward from phase9.
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Pratik Mankawde
2026-07-21 20:34:12 +01:00
parent 0b771c2f41 42615355be
commit ce3d806310
1 changed files with 12 additions and 6 deletions
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18
OpenTelemetryPlan/09-data-collection-reference.md
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@@ -1067,12 +1067,18 @@ via OTLP/HTTP to the OTel Collector and scraped by Prometheus.
#### Per-RPC Method Metrics (Synchronous Counters/Histogram)
| Prometheus Metric | Type | Labels | Description |
| --------------------------- | --------- | ----------------- | -------------------------------- |
| `rpc_method_started_total` | Counter | `method="<name>"` | RPC calls started |
| `rpc_method_finished_total` | Counter | `method="<name>"` | RPC calls completed successfully |
| `rpc_method_errored_total` | Counter | `method="<name>"` | RPC calls that errored |
| `rpc_method_us` | Histogram | `method="<name>"` | Execution time distribution (us) |
| Prometheus Metric | Type | Labels | Description |
| --------------------------- | ------------- | ----------------- | ------------------------------------------------------ |
| `rpc_method_started_total` | Counter | `method="<name>"` | RPC calls started |
| `rpc_method_finished_total` | Counter | `method="<name>"` | RPC calls completed successfully |
| `rpc_method_errored_total` | Counter | `method="<name>"` | RPC calls that errored |
| `rpc_method_us` | Histogram | `method="<name>"` | Execution time distribution (us) |
| `rpc_in_flight_requests` | UpDownCounter | (none) | RPC calls currently executing (+1 rpcStart, -1 rpcEnd) |
`rpc_in_flight_requests` is emitted at its call site via the `XRPL_METRIC_UPDOWN_ADD`
macro (see `src/xrpld/telemetry/MetricMacros.h` and `PerfLogImp.cpp`), not through a
`MetricsRegistry` member. As an UpDownCounter it carries no `_total` suffix (that is
reserved for monotonic counters).
#### Per-Job-Type Metrics (Synchronous Counters/Histogram)