diff --git a/alert-rules.md b/alert-rules.md
index d61f29f59b84e..830ce4153f1fa 100644
--- a/alert-rules.md
+++ b/alert-rules.md
@@ -65,21 +65,6 @@ This section gives the alert rules for the TiDB component.
 
     Same as [`TiDB_schema_error`](#tidb_schema_error).
 
-#### `TiDB_monitor_keep_alive`
-
-* Alert rule:
-
-    `increase(tidb_monitor_keep_alive_total[10m]) < 100`
-
-* Description:
-
-    Indicates whether the TiDB process still exists. If the number of times for `tidb_monitor_keep_alive_total` increases less than 100 in 10 minutes, the TiDB process might already exit and an alert is triggered.
-
-* Solution:
-
-    * Check whether the TiDB process is out of memory.
-    * Check whether the machine has restarted.
-
 ### Critical-level alerts
 
 #### `TiDB_server_panic_total`