SQLSTATE[HY000] [1040] Too many connections

<h1>SQLSTATE[HY000] [1040] Too many connections</h1>Typecho_Db_Adapter_Exception: SQLSTATE[HY000] [1040] Too many connections in /www/sites/notemi.cn/index/var/Typecho/Db/Adapter/Pdo.php:60<br />
Stack trace:<br />
#0 /www/sites/notemi.cn/index/var/Typecho/Db.php(198): Typecho_Db_Adapter_Pdo->connect(Object(Typecho_Config))<br />
#1 /www/sites/notemi.cn/index/var/Typecho/Db.php(349): Typecho_Db->selectDb(1)<br />
#2 /www/sites/notemi.cn/index/var/Typecho/Db.php(382): Typecho_Db->query(Object(Typecho_Db_Query), 1)<br />
#3 /www/sites/notemi.cn/index/var/Widget/Options.php(345): Typecho_Db->fetchAll(Object(Typecho_Db_Query), Array)<br />
#4 /www/sites/notemi.cn/index/var/Typecho/Widget.php(221): Widget_Options->execute()<br />
#5 /www/sites/notemi.cn/index/var/Widget/Init.php(31): Typecho_Widget::widget('Widget_Options')<br />
#6 /www/sites/notemi.cn/index/var/Typecho/Widget.php(221): Widget_Init->execute()<br />
#7 /www/sites/notemi.cn/index/index.php(17): Typecho_Widget::widget('Widget_Init')<br />
#8 {main}