# 查询主动丢弃的非告警数据

积压采样只丢弃部分普通日志和非标消息，告警全部保留。审计数据保存在达梦表
`syslog_backlog_retention_hourly`。

## 查看当前运行累计值

```bash
docker exec syslog-consumer-rule-dm sh -c \
  'curl -fsS http://127.0.0.1:8289/xdrrule/api/syslog/backlog-sampling/status'
```

主要字段：

- `normal_rows_dropped_total`：本次应用启动后主动丢弃的普通日志行数；
- `non_normal_rows_dropped_total`：本次应用启动后主动丢弃的非标消息行数；
- `raw_dropped_total`：本次应用启动后没有写入 InfluxDB 的原文条数。

## 查询指定一天的丢弃总数

以下查询统计上海时间 `2026-09-13` 一整天：

```sql
SELECT
    NVL(SUM(normal_rows_dropped), 0) AS normal_dropped,
    NVL(SUM(non_normal_rows_dropped), 0) AS non_normal_dropped,
    NVL(SUM(normal_rows_dropped), 0)
      + NVL(SUM(non_normal_rows_dropped), 0) AS non_alarm_rows_dropped,
    NVL(SUM(raw_dropped), 0) AS raw_dropped,
    NVL(SUM(alarm_rows_total), 0) AS alarm_total,
    NVL(SUM(alarm_rows_saved), 0) AS alarm_saved
FROM syslog_backlog_retention_hourly
WHERE source_hour >= TIMESTAMP '2026-09-13 00:00:00'
  AND source_hour <  TIMESTAMP '2026-09-14 00:00:00';
```

## 按小时统计

```sql
SELECT
    source_hour,
    SUM(normal_rows_dropped) AS normal_dropped,
    SUM(non_normal_rows_dropped) AS non_normal_dropped,
    SUM(normal_rows_dropped) + SUM(non_normal_rows_dropped)
        AS non_alarm_rows_dropped,
    SUM(raw_dropped) AS raw_dropped,
    SUM(alarm_rows_total) AS alarm_total,
    SUM(alarm_rows_saved) AS alarm_saved,
    MAX(max_lag_ms) AS max_lag_ms
FROM syslog_backlog_retention_hourly
WHERE source_hour >= TIMESTAMP '2026-09-13 00:00:00'
  AND source_hour <  TIMESTAMP '2026-09-14 00:00:00'
GROUP BY source_hour
ORDER BY source_hour;
```

`non_alarm_rows_dropped` 是普通和非标两类达梦业务行的合计。`raw_dropped` 是原始消息口径，
可能与这两类记录重叠，因此不要再把 `raw_dropped` 加到 `non_alarm_rows_dropped` 中。

正常情况下 `alarm_total` 应等于 `alarm_saved`。查询结果为零或没有小时记录，表示该时间段没有触发
积压采样，或者采样审计尚未成功写入。