情况是这样的：两台web（nginx）主机，一台mysql主机,pv在几十到百万左右，两台web主机做的集群，比重为3:1，现在出现的问题是3这台会偶尔出现数据库连不上的问题，而1那台就不存在这个问题，不知道为什么，应该不上配置上的问题，两台web配置一样的，我在网上也看到过类似情况，yii在高并发时数据库偶尔联系不上啊，求解啊，（我的邮箱:yanghuolong@v1.cn）
错误信息：
2012/08/31 17:37:11 [error] [exception.CDbException] SQLSTATE[HY000] [2003] Can’t connect to MySQL server on ‘192.168.0.214’ (110)
2012/08/31 17:37:11 [error] [exception.CDbException] SQLSTATE[HY000] [2003] Can’t connect to MySQL server on ‘192.168.0.214’ (110)
2012/08/31 17:37:11 [error] [exception.CDbException] exception ‘CDbException’ with message ‘CDbConnection failed to open the DB connection.’ in /VODONE/www/yii/framework/db/CDbConnection.php:388
Stack trace:
#0 /VODONE/www/yii/framework/db/CDbConnection.php(331): CDbConnection->open()
#1 /VODONE/www/yii/framework/db/CDbConnection.php(309): CDbConnection->setActive(true)
#2 /VODONE/www/yii/framework/base/CModule.php(388): CDbConnection->init()
#3 /VODONE/www/yii/framework/base/CApplication.php(431): CModule->getComponent(‘db’)
#4 /VODONE/www/yii/framework/db/ar/CActiveRecord.php(624): CApplication->getDb()
#5 /VODONE/www/yii/framework/db/ar/CActiveRecord.php(2311): CActiveRecord->getDbConnection()
#6 /VODONE/www/yii/framework/db/ar/CActiveRecord.php(388): CActiveRecordMetaData->__construct(Object(Vsetting))
#7 /VODONE/www/face.v1.cn/protected/models/original/Setting.php(24): CActiveRecord::model(‘Vsetting’)
#8 /VODONE/www/face.v1.cn/protected/models/develop/Vsetting.php(15): Setting::model(‘Vsetting’)
#9 /VODONE/www/face.v1.cn/protected/components/FrontController.php(16): Vsetting::model()
#10 /VODONE/www/face.v1.cn/protected/front/modules/api/controllers/JsonpcmsController.php(6): FrontController->init()
#11 /VODONE/www/yii/framework/web/CWebApplication.php(282): JsonpcmsController->init()
#12 /VODONE/www/yii/framework/web/CWebApplication.php(142): CWebApplication->runController(‘api/jsonpcms/ge…’)
#13 /VODONE/www/yii/framework/base/CApplication.php(162): CWebApplication->processRequest()
#14 /VODONE/www/face.v1.cn/index.php(12): CApplication->run()
#15 {main}
REQUEST_URI=/index.php?r=api/jsonpcms/getCmsComment&callback=jsonp1346405842265&_=1346405843578&contentid=-13040561&num=4&vcookie=&pageUrl=http%3A%2F%2Fnews.v1.cn%2Fdomestic%2Fa%2F2012-8-31%2F1346402909801v.shtml&ptitle=%E8%A7%86%E9%A2%91%EF%BC%9A%E6%8C%81%E5%88%80%E5%8A%AB%E5%8C%AA%E9%81%AD%E5%9B%B4%E6%AE%B4+%E8%A2%AB%E6%8A%A2%E5%A5%B3%E5%AD%90%E6%8C%BA%E8%BA%AB%E9%98%BB%E6%AD%A2±+%E6%96%B0%E9%97%BB%E9%A2%91%E9%81%93±+%E7%AC%AC%E4%B8%80%E8%A7%86%E9%A2%91
HTTP_REFERER=http://news.v1.cn/domestic/a/2012-8-31/1346402909801v.shtml