diff --git a/src/common/backend/utils/misc/guc.cpp b/src/common/backend/utils/misc/guc.cpp
index 2a543a6d0..331e6f032 100644
--- a/src/common/backend/utils/misc/guc.cpp
+++ b/src/common/backend/utils/misc/guc.cpp
@@ -6661,7 +6661,7 @@ static void init_configure_names_int()
                 NULL
             },
             &g_instance.attr.attr_storage.max_wal_senders,
-            4,
+            16,
             0,
             MAX_BACKENDS,
             NULL,