diff --git a/dsLightRag/Util/PostgreSQLUtil.py b/dsLightRag/Util/PostgreSQLUtil.py
index a908d064..563dab8a 100644
--- a/dsLightRag/Util/PostgreSQLUtil.py
+++ b/dsLightRag/Util/PostgreSQLUtil.py
@@ -12,8 +12,9 @@ POSTGRES_CONFIG = {
     "user": POSTGRES_USER,
     "password": POSTGRES_PASSWORD,
     "database": POSTGRES_DATABASE,
-    "min_size": 1,
+    "min_size": 0,  # 设置为0表示不保留空闲连接
     "max_size": 20,
+    "max_inactive_connection_lifetime": 0,  # 连接立即过期
     "command_timeout": 60
 }