diff --git a/dashboard/dashboard-metrics-relation.md b/dashboard/dashboard-metrics-relation.md
index 25425bee92927..c11d622de065e 100644
--- a/dashboard/dashboard-metrics-relation.md
+++ b/dashboard/dashboard-metrics-relation.md
@@ -86,4 +86,4 @@ However, it is hard to determine how much duration of `tidb_kv_request` is inclu
 
 `tidb_kv_request` does not include `tidb_kv_request.Get` and `tidb_kv_request.Cop` nodes as its child nodes, but consists of the latter two nodes. The name prefix of the child node is the name of the parent node plus `.xxx`, which means that the child node is the sub-class of the parent node. You can understand this case in the following way:
 
-The total duration of TiDB sending key-value requests is 14745.07 seconds, during which the key-value requests for the `Get` and `Cop` types respectively consume 9798.02 seconds and 4946.46 seconds.
+The total duration of TiDB sending key-value requests is 14744.48 seconds, during which the key-value requests for the `Get` and `Cop` types respectively consume 9798.02 seconds and 4946.46 seconds.