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feat(go): expose fast writer nats consumer metrics

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lingniu
2026-07-03 19:24:02 +08:00
parent c43b87d648
commit d08bf17111
6 changed files with 63 additions and 3 deletions
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docs/ops/go-vehicle-ingest-memory.md
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@@ -426,11 +426,14 @@ vehicle_fast_writer_stage_duration_ms_histogram_sum{subject,stage,status}
同时新增 batch pending gauge：
```text
vehicle_fast_writer_nats_consumer_pending{stream,consumer}
vehicle_fast_writer_nats_consumer_ack_pending{stream,consumer}
vehicle_fast_writer_nats_consumer_waiting{stream,consumer}
vehicle_fast_writer_batch_pending_messages
vehicle_fast_writer_batch_pending_envelopes
```
这两个指标表示 fast-writer 已拉取但尚未完成 TDengine/Redis/ack 的批内压力。带帧率压测时它们应在稳态接近 0，burst 后能够回落；如果持续非 0，需要结合 `vehicle_fast_writer_stage_duration_ms_histogram` 判断卡在 TDengine、Redis 还是 ack。
`vehicle_fast_writer_nats_consumer_*` 表示 JetStream durable consumer 层面的 backlog/ack-pending；`vehicle_fast_writer_batch_pending_*` 表示 fast-writer 已拉取但尚未完成 TDengine/Redis/ack 的批内压力。带帧率压测时它们应在稳态接近 0，burst 后能够回落；如果持续非 0，需要结合 `vehicle_fast_writer_stage_duration_ms_histogram` 判断卡在 NATS 拉取、TDengine、Redis 还是 ack。
### NATS Kafka bridge batch 指标