diff --git a/api/extensions/ext_database.py b/api/extensions/ext_database.py
index c90b1d0a9f..2e0d4c889a 100644
--- a/api/extensions/ext_database.py
+++ b/api/extensions/ext_database.py
@@ -53,3 +53,10 @@ def _setup_gevent_compatibility():
 def init_app(app: DifyApp):
     db.init_app(app)
     _setup_gevent_compatibility()
+
+    # Eagerly build the engine so pool_size/max_overflow/etc. come from config
+    try:
+        with app.app_context():
+            _ = db.engine  # triggers engine creation with the configured options
+    except Exception:
+        logger.exception("Failed to initialize SQLAlchemy engine during app startup")