log里面记录了大量的不需需要的401 401的错误,占据了大量的磁盘空间; 

'log' => [

'traceLevel' => YII_DEBUG ? 3 : 0,

'targets' => [

[

'class' => 'yiilogFileTarget',

'levels' => ['error','warning'],

'except' => [

'yiiwebHttpException:401',

'yiiwebHttpException:404',

],

'logVars' => [], //Disable logging of _SERVER,_POST,etc.

],