Warning: mysqli_connect(): (HY000/1040): Too many connections in /var/www/smsys/data/www/sm-sys.ru/_/lib/functions.php on line 8

Warning: mysqli_query() expects parameter 1 to be mysqli, boolean given in /var/www/smsys/data/www/sm-sys.ru/_/lib/functions.php on line 9

Warning: mysqli_error() expects parameter 1 to be mysqli, boolean given in /var/www/smsys/data/www/sm-sys.ru/_/lib/functions.php on line 44
I cannot connect to the database because: