add: change deafult pre_load

src/memos/api/product_api.py

@@ -33,6 +33,6 @@
 
     parser = argparse.ArgumentParser()
     parser.add_argument("--port", type=int, default=8001)
-    parser.add_argument("--workers", type=int, default=32)
+    parser.add_argument("--workers", type=int, default=1)
     args = parser.parse_args()
     uvicorn.run("memos.api.product_api:app", host="0.0.0.0", port=args.port, workers=args.workers)

src/memos/mem_os/product.py

@@ -179,14 +179,14 @@ def _restore_user_instances(
         """
         try:
             # Get all user configurations from persistent storage
-            user_configs = self.user_manager.list_user_configs()
+            user_configs = self.user_manager.list_user_configs(self.max_user_instances)
 
             # Get the raw database records for sorting by updated_at
             session = self.user_manager._get_session()
             try:
                 from memos.mem_user.persistent_user_manager import UserConfig
 
-                db_configs = session.query(UserConfig).all()
+                db_configs = session.query(UserConfig).limit(self.max_user_instances).all()
                 # Create a mapping of user_id to updated_at timestamp
                 updated_at_map = {config.user_id: config.updated_at for config in db_configs}
 

src/memos/mem_user/mysql_persistent_user_manager.py

@@ -188,15 +188,15 @@ def delete_user_config(self, user_id: str) -> bool:
         finally:
             session.close()
 
-    def list_user_configs(self) -> dict[str, MOSConfig]:
+    def list_user_configs(self, limit: int = 1) -> dict[str, MOSConfig]:
         """List all user configurations.
 
         Returns:
             Dict[str, MOSConfig]: Dictionary mapping user_id to MOSConfig.
         """
         session = self._get_session()
         try:
-            user_configs = session.query(UserConfig).all()
+            user_configs = session.query(UserConfig).limit(limit).all()
             result = {}
 
             for user_config in user_configs: