Failed to connect to the database: PDOException: SQLSTATE[08004] [1040] Too many connections in /mnt/cephfs/sites/w/www-bytom/htdocs/framework/services/db.php:14 Stack trace: #0 /mnt/cephfs/sites/w/www-bytom/htdocs/framework/services/db.php(14): PDO->__construct() #1 /mnt/cephfs/sites/w/www-bytom/htdocs/framework/bootstrap.php(57): db::connect() #2 /mnt/cephfs/sites/w/www-bytom/htdocs/public/controllers/index.php(3): require_once('/mnt/cephfs/sit...') #3 {main}