Too many connections

FILE: /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/Db.class.php 　LINE: 162

[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/Db.class.php (162) DbMysql->connect()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (94) Db->initConnect()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (213) DbMysql->query(SHOW COLUMNS FROM `tp_articlecat`)
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/Model.class.php (135) DbMysql->getFields(tp_articlecat)
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/Model.class.php (123) Model->flush()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/Model.class.php (1176) Model->_checkTableInfo()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/Model.class.php (98) Model->db(0, )
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Common/common.php (294) Model->__construct(articlecat, , )
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/Home/Lib/Action/CommonAction.class.php (25) M(articlecat)
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Common/common.php (321) CommonAction->__construct()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/App.class.php (120) A(Empty)
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/App.class.php (207) App::exec()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Lib/Core/Think.class.php (39) App::run()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Common/runtime.php (242) Think::start()
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/ThinkPHP/ThinkPHP.php (30) require(/www/wwwroot/changqi_site/91changqi.com/ThinkPHP/Common/runtime.php)
[22-12-02 13:50:12] /www/wwwroot/changqi_site/91changqi.com/index.php (144) require(/www/wwwroot/changqi_site/91changqi.com/ThinkPHP/ThinkPHP.php)