diff --git a/kiri-engine/Pool/Connection.php b/kiri-engine/Pool/Connection.php
index 23efb45f..2bdea9ac 100644
--- a/kiri-engine/Pool/Connection.php
+++ b/kiri-engine/Pool/Connection.php
@@ -124,6 +124,7 @@ class Connection extends Component
 			$link = new \PDO('mysql:dbname=' . $config['dbname'] . ';host=' . $config['cds'], $config['username'], $config['password'], [
 				\PDO::ATTR_EMULATE_PREPARES   => false,
 				\PDO::ATTR_CASE               => \PDO::CASE_NATURAL,
+				\PDO::ATTR_PERSISTENT         => true,
 				\PDO::ATTR_TIMEOUT            => $config['connect_timeout'],
 				\PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES ' . ($config['charset'] ?? 'utf8mb4')
 			]);