Too many connections

FILE: /home/wwwroot/ThinkPHP/Lib/Core/Db.class.php 　LINE: 168

[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/Db.class.php (168) DbMysql->connect()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (96) Db->initConnect()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Driver/Db/DbMysql.class.php (215) DbMysql->query(SHOW COLUMNS FROM `chg_location`)
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/Model.class.php (135) DbMysql->getFields(chg_location)
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/Model.class.php (123) Model->flush()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/Model.class.php (1156) Model->_checkTableInfo()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/Model.class.php (98) Model->db(0, )
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Common/common.php (277) Model->__construct(location, , )
[18-10-22 05:38:10] /home/wwwroot/www.16ch.cn/caihonggu/Lib/Action/Home/CommonAction.class.php (21) M(location)
[18-10-22 05:38:10] /home/wwwroot/www.16ch.cn/caihonggu/Lib/Action/Home/TourAction.class.php (4) CommonAction->_initialize()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/Action.class.php (57) TourAction->_initialize()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Common/common.php (299) Action->__construct()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/App.class.php (104) A(Home/Tour)
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/App.class.php (208) App::exec()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Lib/Core/Think.class.php (39) App::run()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/Common/runtime.php (243) Think::start()
[18-10-22 05:38:10] /home/wwwroot/ThinkPHP/ThinkPHP.php (30) require(/home/wwwroot/ThinkPHP/Common/runtime.php)
[18-10-22 05:38:10] /home/wwwroot/www.16ch.cn/index.php (8) require(/home/wwwroot/ThinkPHP/ThinkPHP.php)