SQLSTATE[HY000] [1040] Too many connections

Typecho_Db_Adapter_Exception: SQLSTATE[HY000] [1040] Too many connections in /www/wwwroot/shejipai.net/var/Typecho/Db/Adapter/Pdo.php:60 Stack trace: #0 /www/wwwroot/shejipai.net/var/Typecho/Db.php(210): Typecho_Db_Adapter_Pdo->connect() #1 /www/wwwroot/shejipai.net/var/Typecho/Db.php(293): Typecho_Db->selectDb() #2 /www/wwwroot/shejipai.net/var/Widget/Options.php(78): Typecho_Db->select() #3 /www/wwwroot/shejipai.net/var/Typecho/Widget.php(168): Widget_Options->execute() #4 /www/wwwroot/shejipai.net/var/Widget/Init.php(27): Typecho_Widget::widget() #5 /www/wwwroot/shejipai.net/var/Typecho/Widget.php(168): Widget_Init->execute() #6 /www/wwwroot/shejipai.net/index.php(17): Typecho_Widget::widget() #7 {main}