diff --git a/Canal-prometheus.md b/Canal-prometheus.md
index 35e14db..7d687dc 100644
--- a/Canal-prometheus.md
+++ b/Canal-prometheus.md
@@ -86,11 +86,11 @@ canal_instance_traffic_delay / 1000
 ```
 rate(canal_instance_received_binlog_bytes{destination="example"}[2m]) / 1024
 ```
-**Dump线程接受binlog所占用带宽。当'Sink线程空闲比'与'Dump线程空闲比'都很低，delay却比较高的情况，请查看binlog接收速率是否符合预期。**
+**Dump线程读取binlog所占用带宽。当'Sink线程空闲比'与'Dump线程空闲比'都很低，delay却比较高的情况，请查看binlog接收速率是否符合预期。**
 ```
 rate(canal_instance_client_bytes{destination="example"}[2m]) / 1024
 ```
-**Instance client订阅后消费所占用的带宽。**
+**向Instance client发送格式化binlog所占用的带宽。MySQL低负载时，client get所返回的空包同样会占用不少的带宽。**
 ***
 
 ##### TPS(Binlog events)