diff --git a/php/src/db/mysql/Mysql.php b/php/src/db/mysql/Mysql.php
index 3031583..f3ba8b7 100644
--- a/php/src/db/mysql/Mysql.php
+++ b/php/src/db/mysql/Mysql.php
@@ -6,6 +6,21 @@ use nulib\db\pdo\Pdo;
 class Mysql extends Pdo {
   const PREFIX = "mysql";
 
+  static function config_setWaitTimeout(self $mysql): void {
+    $mysql->_exec("set session wait_timeout = 28800");
+  }
+  const CONFIG_setWaitTimeout = [self::class, "config_setWaitTimeout"];
+
+  static function config_unbufferedQueries(self $mysql): void {
+    $mysql->db->setAttribute(\PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, false);
+  }
+  const CONFIG_unbufferedQueries = [self::class, "config_unbufferedQueries"];
+
+  protected const DEFAULT_CONFIG = [
+    ...parent::DEFAULT_CONFIG,
+    self::CONFIG_setWaitTimeout,
+  ];
+
   function getDbname(): ?string {
     $url = $this->dbconn["name"] ?? null;
     if ($url !== null && preg_match('/^mysql(?::|.*;)dbname=([^;]+)/i', $url, $ms)) {
diff --git a/php/src/db/pdo/Pdo.php b/php/src/db/pdo/Pdo.php
index 094b784..d06f5dd 100644
--- a/php/src/db/pdo/Pdo.php
+++ b/php/src/db/pdo/Pdo.php
@@ -40,11 +40,6 @@ class Pdo implements IDatabase {
   }
   const CONFIG_errmodeException_lowerCase = [self::class, "config_errmodeException_lowerCase"];
 
-  static function config_unbufferedQueries(self $pdo): void {
-    $pdo->db->setAttribute(\PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, false);
-  }
-  const CONFIG_unbufferedQueries = [self::class, "config_unbufferedQueries"];
-
   protected const OPTIONS = [
     \PDO::ATTR_PERSISTENT => true,
   ];