emq消费延时10几秒

这是一次消息完整的追踪日志

2024-01-16T18:58:04+08:00 [MQTT] zhny/进线柜@36.150.155.122:12636 msg: mqtt_packet_sent, packet: PUBACK(Q0, R0, D0, PacketId=48, ReasonCode=0)
2024-01-16T18:58:10+08:00 [MQTT] zhny/1进线柜@36.150.155.122:12636 msg: mqtt_packet_received, packet: PINGREQ(Q0, R0, D0)
2024-01-16T18:58:10+08:00 [MQTT] zhny/1进线柜@36.150.155.122:12636 msg: mqtt_packet_sent, packet: PINGRESP(Q0, R0, D0)
2024-01-16T18:58:20+08:00 [MQTT] zhny/1进线柜@36.150.155.122:12636 msg: mqtt_packet_received, packet: PINGREQ(Q0, R0, D0)
2024-01-16T18:58:20+08:00 [MQTT] zhny/1进线柜@36.150.155.122:12636 msg: mqtt_packet_sent, packet: PINGRESP(Q0, R0, D0)
2024-01-16T18:58:30+08:00 [MQTT] zhny/进线柜@36.150.155.122:12636 msg: mqtt_packet_received, packet: PINGREQ(Q0, R0, D0)
2024-01-16T18:58:30+08:00 [MQTT] zhny/1进线柜@36.150.155.122:12636 msg: mqtt_packet_sent, packet: PINGRESP(Q0, R0, D0)

日志里除了 10s 为周期的 PING 交互之外,只有一个 PUBACK,并没有看到消息延迟的情况。