因为当运用模型(model)时,AR的一些公共属性都会从DB中获取,这样会导致服务器负担一些额外的资源开销,实际上对于成品来说,服务器这些开始销是多余的,故应该阻止这种默认行为
开启schema缓存:
'db'=>array( ... 'enableSchemaCache' => true, 'schemaCacheDuration'=>86400, // time in seconds ... ),
参考地址: http://blog.csdn.net/yuhui_fish/article/details/11608219
http://www.yiichina.com/doc/api/2.0/yii-db-command
http://www.larryullman.com/2010/06/28/caching-the-database-schema-using-memcached-with-yii/