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feat(go): expose fast writer batch pending metrics

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lingniu
2026-07-03 19:20:09 +08:00
parent 3b694671fa
commit c43b87d648
6 changed files with 93 additions and 4 deletions
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docs/ops/go-service-observability.md
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@@ -47,6 +47,8 @@ curl -fsS http://127.0.0.1:20200/readyz
| `vehicle_bridge_batch_pending_messages` | NATS messages fetched by the bridge but not yet written to Kafka and acked. |
| `vehicle_bridge_batch_pending_kafka_messages` | Kafka messages prepared for the current bridge batch. |
| `vehicle_bridge_batch_duration_ms_histogram` | Bridge batch duration histogram covering Kafka write and NATS ack. Labels: `status`. |
| `vehicle_fast_writer_batch_pending_messages` | NATS fast writer messages fetched but not yet written to TDengine/Redis and acked. |
| `vehicle_fast_writer_batch_pending_envelopes` | Valid parsed envelopes in the current NATS fast writer batch. |
| `vehicle_fast_writer_stage_duration_ms_histogram` | Fast writer stage duration histogram for TDengine, Redis, and NATS ack. Labels: `subject`, `stage`, `status`. |
| `vehicle_history_writes_total` | TDengine history writes. Labels: `topic`, `status`. |
| `vehicle_history_batch_pending_messages` | Messages fetched by history writer but not yet flushed and committed. |