From b9cb25b0e8be55822b0c59f916dcf579c232793d Mon Sep 17 00:00:00 2001
From: lcybo <chuanyili0625@gmail.com>
Date: Wed, 29 Aug 2018 20:14:41 +0800
Subject: [PATCH] Updated Prometheus QuickStart (markdown)

---
 Prometheus-QuickStart.md | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Prometheus-QuickStart.md b/Prometheus-QuickStart.md
index b3a0498..e85462d 100644
--- a/Prometheus-QuickStart.md
+++ b/Prometheus-QuickStart.md
@@ -95,9 +95,9 @@ clamp_max(rate(canal_instance_publish_blocking_time{destination="example"}[2m]),
 ```
 **dump线程blocking时间片比例(仅parallel mode, dump线程向disruptor发布event时)。若idle占比较高：**
 
-**1. Sinking idle ratio也很高，则瓶颈是因为client的consume速度相对较慢。**
+**1. Sinking blocking ratio也很高，则瓶颈是因为client的consume速度相对较慢。**
 
-**2. Sinking idle ratio较低，那么server端parser是性能瓶颈，可参考[Performance](https://github.com/alibaba/canal/wiki/Performance)进行tuning.**
+**2. Sinking blocking ratio较低，那么server端parser是性能瓶颈，可参考[Performance](https://github.com/alibaba/canal/wiki/Performance)进行tuning.**
 ***
 
 ##### Delay(seconds)
@@ -118,6 +118,8 @@ canal_instance_get_delay{destination="example"} / 1000
 canal_instance_ack_delay{destination="example"} / 1000
 ```
 **Client ack操作时间点的延时。**
+
+**Note: delay的准确度依赖于master与canal server间的ntp同步。当binlog execTime超过canal server当前时间戳，则delay为0.**
 ***
 
 ##### 网络带宽(KB/s)