diff --git a/alert-rules.md b/alert-rules.md
index 8c911482df9a9..91e0a1d8a6227 100644
--- a/alert-rules.md
+++ b/alert-rules.md
@@ -345,7 +345,7 @@ This section gives the alert rules for the PD component.
 
 * Alert rule:
 
-    `count(changes(pd_server_tso{type="save"}[10m]) > 0) >= 2`
+    `count(changes(pd_tso_events{type="save"}[10m]) > 0) >= 2`
 
 * Description:
 
@@ -376,7 +376,7 @@ This section gives the alert rules for the PD component.
 
 * Alert rule:
 
-    `changes(pd_server_tso{type="system_time_slow"}[10m]) >= 1`
+    `changes(pd_tso_events{type="system_time_slow"}[10m]) >= 1`
 
 * Description:
 
@@ -943,7 +943,7 @@ This section gives the alert rules for the Node_exporter host.
 
 * Alert rule:
 
-    `((rate(node_disk_write_time_seconds_total{device=~".+"}[5m]) / rate(node_disk_writes_completed_total{device=~".+"}[5m])) or (irate(node_disk_write_time_seconds_total{device=~".+"}[5m]) / irate(node_disk_writes_completed_total{device=~".+"}[5m]))) * 1000 > 16`
+    `((rate(node_disk_write_time_seconds_total{device=~".+"}[5m]) / rate(node_disk_writes_completed_total{device=~".+"}[5m])) or (irate(node_disk_write_time_seconds_total{device=~".+"}[5m]) / irate(node_disk_writes_completed_total{device=~".+"}[5m])))> 16`
 
 * Description: