diff --git a/conf/tidb.yml b/conf/tidb.yml
index ecb4f3be9..2002731f7 100644
--- a/conf/tidb.yml
+++ b/conf/tidb.yml
@@ -121,6 +121,10 @@ performance:
   # row count in statistics of a table is greater than it.
   # pseudo-estimate-ratio: 0.8
 
+  # Force the priority of all statements in a specified priority.
+  # The value could be "NO_PRIORITY", "LOW_PRIORITY", "HIGH_PRIORITY" or "DELAYED".
+  # force-priority: "NO_PRIORITY"
+
 proxy_protocol:
   # PROXY protocol acceptable client networks.
   # Empty string means disable PROXY protocol, * means all networks.
diff --git a/roles/tidb/vars/default.yml b/roles/tidb/vars/default.yml
index 7f9be5759..af8ca3467 100644
--- a/roles/tidb/vars/default.yml
+++ b/roles/tidb/vars/default.yml
@@ -139,6 +139,10 @@ performance:
   # row count in statistics of a table is greater than it.
   pseudo-estimate-ratio: 0.8
 
+  # Force the priority of all statements in a specified priority.
+  # The value could be "NO_PRIORITY", "LOW_PRIORITY", "HIGH_PRIORITY" or "DELAYED".
+  force-priority: "NO_PRIORITY"
+
 proxy_protocol:
   # PROXY protocol acceptable client networks.
   # Empty string means disable PROXY protocol, * means all networks.