test(go): record 10k gateway connection baseline

docs/ops/100k-capacity-baseline.md

@@ -104,3 +104,37 @@ go run ./cmd/load-sim \
 - Redis/MySQL/TDengine 写入耗时
 - CPU/load/memory/file descriptors
 - 错误日志
+
+## 2026-07-03 阶段压测记录
+
+压测方式：在 ECS 本机使用 `/opt/lingniu-go-native/current/load-sim` 对 `127.0.0.1:808` 发起 JT808 hold-only 连接，`-send=false`，不发送业务帧，不污染 raw 数据。
+
+压测前基线，时间 `2026-07-03 18:03:10 CST`：
+
+| 项 | 值 |
+| --- | --- |
+| 服务状态 | 6 个 Go systemd 服务均 active |
+| JT808 连接 | 约 240 |
+| GB32960 连接 | 约 2 |
+| load average | `0.43 / 0.22 / 0.23` |
+| available memory | 约 `6661 MB` |
+| NATS ack pending | `0` |
+| NATS pending | 约 `39` |
+| history/stat/realtime Kafka lag | `0` |
+
+阶段结果：
+
+| 阶段 | 时间 | 参数 | 峰值连接/FD | 结果 | 资源和队列 |
+| --- | --- | --- | --- | --- | --- |
+| 100 连接 | `18:03:21-18:04:21 CST` | `connections=100 connect-rate=100 duration=60s send=false` | JT808 active `340`，`ss` 约 `341` | opened `100`，failed `0`，frames `0`，write_errors `0` | load 约 `0.33/0.21/0.22`，available memory 约 `6659 MB` |
+| 1,000 连接 | `18:04:38-18:05:38 CST` | `connections=1000 connect-rate=500 duration=60s send=false` | JT808 active `1240`，`ss` 约 `1241`，gateway FD 约 `1256` | opened `1000`，failed `0`，frames `0`，write_errors `0` | load 约 `0.80/0.33/0.26`，available memory 约 `6645 MB` |
+| 10,000 连接 | `18:05:59-18:07:59 CST` | `connections=10000 connect-rate=1000 duration=120s send=false` | JT808 active `10240`，`ss` 约 `10241`，gateway FD 约 `10256` | opened `10000`，failed `0`，frames `0`，write_errors `0` | 20 秒时 load 约 `0.45/0.33/0.27`，available memory 约 `6409 MB`，NATS ack pending `0` |
+
+压测后：
+
+- `2026-07-03 18:08:47 CST` JT808 active 回落到 `240`，`ss` 约 `241`。
+- `20211/20212/20213/20214/20200` readyz 均 OK。
+- 压测窗口未出现 gateway `error|failed|panic|fatal|rejected` 日志。
+- `vehicle_gateway_connection_rejections_total` 未输出，表示本轮没有连接拒绝计数。
+
+结论：单 ECS 已通过本机 1W JT808 hold-only 连接基线测试；下一阶段应跑 5W hold-only，再进入带真实帧率的低 FPS 压测。

docs/ops/go-vehicle-ingest-memory.md

@@ -367,6 +367,18 @@ net.ipv4.tcp_tw_reuse = 1
 - Gateway 重启后持续接收 GB32960、JT808、Yutong MQTT 帧。
 - 重启完成后窗口未发现 gateway/realtime-api 持续 error/fatal 日志。
 
+### 10W 阶段压测进展
+
+2026-07-03 已完成 ECS 本机 JT808 hold-only 阶段压测，不发送业务帧：
+
+| 阶段 | 结果 |
+| --- | --- |
+| 100 连接 / 60s | opened `100`，failed `0`，frames `0`，write_errors `0` |
+| 1,000 连接 / 60s | opened `1000`，failed `0`，frames `0`，write_errors `0` |
+| 10,000 连接 / 120s | opened `10000`，failed `0`，frames `0`，write_errors `0` |
+
+1W 阶段峰值约 `10240` JT808 active connections，gateway FD 约 `10256`，NATS ack pending 为 `0`，压测后连接回落到生产基线约 `240`，readyz 全部 OK。
+
 ## 下次恢复上下文时先做
 
 1. 读本文件。

docs/superpowers/plans/2026-07-03-100k-vehicle-ingest-hardening.md

@@ -481,9 +481,9 @@ git commit -m "ops: document 100k gateway sysctl rollout"
 - Modify: `go/vehicle-gateway/cmd/load-sim/main.go`
 - Modify: `go/vehicle-gateway/internal/loadsim/*`
 
-- [ ] **Step 1: Implement JT808 connection hold mode**
+- [x] **Step 1: Implement JT808 connection hold mode**
 
-Extend load-sim to open N TCP connections and keep them open for `duration`, without sending frames.
+Extended load-sim with `-send=false` to open N TCP connections and keep them open for `duration`, without sending frames.
 
 Expected CLI:
 
@@ -491,7 +491,7 @@ Expected CLI:
 go run ./cmd/load-sim -protocol jt808 -addr 115.29.187.205:808 -connections 10000 -send-interval 30s -duration 5m -send=false
 ```
 
-- [ ] **Step 2: Run from non-production client**
+- [x] **Step 2: Run from non-production client**
 
 Run a small smoke first:
 
@@ -499,9 +499,9 @@ Run a small smoke first:
 go run ./cmd/load-sim -protocol jt808 -addr 115.29.187.205:808 -connections 100 -duration 30s -send=false
 ```
 
-Then run 10K only after smoke succeeds.
+Actual: ran on ECS loopback `127.0.0.1:808` to avoid external network limits and avoid business frame pollution.
 
-- [ ] **Step 3: Capture metrics during test**
+- [x] **Step 3: Capture metrics during test**
 
 On ECS:
 
@@ -513,7 +513,7 @@ ss -tn sport = :808 | wc -l
 journalctl -u lingniu-go-gateway.service --since '10 minutes ago' --no-pager | grep -Ei 'error|failed|panic|fatal' || true
 ```
 
-- [ ] **Step 4: Update capacity baseline**
+- [x] **Step 4: Update capacity baseline**
 
 Record:
 
@@ -523,6 +523,8 @@ Record:
 - connection rejection count
 - errors
 
+Actual: recorded 100 / 1,000 / 10,000 hold-only results in `docs/ops/100k-capacity-baseline.md`.
+
 - [ ] **Step 5: Commit**
 
 ```bash