diff --git a/src/memos/graph_dbs/polardb.py b/src/memos/graph_dbs/polardb.py
index da1635296..4fac01587 100644
--- a/src/memos/graph_dbs/polardb.py
+++ b/src/memos/graph_dbs/polardb.py
@@ -145,7 +145,7 @@ def __init__(self, config: PolarDBGraphDBConfig):
         # Create connection pool
         self.connection_pool = psycopg2.pool.ThreadedConnectionPool(
             minconn=5,
-            maxconn=2000,
+            maxconn=100,
             host=host,
             port=port,
             user=user,