• laravel 5.3 + php7.0 + mysql 5.7 + nginx 开发的项目

• 偶尔会出现网页加载不出来，网页一直处于加载中。

• php-fpm慢查询显示

[0x00007f0689a164c0] call_user_func() /XXX/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:102
[0x00007f0689a163a0] then() /XXX/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:114
[0x00007f0689a161d0] callWithinStack() /XXX/vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:68
[0x00007f0689a16090] dispatch() /XXX/vendor/laravel/framework/src/Illuminate/Routing/Route.php:203
[0x00007f0689a15f30] runWithCustomDispatcher() /XXX/vendor/laravel/framework/src/Illuminate/Routing/Route.php:134
[0x00007f0689a15dd0] run() /XXX/vendor/laravel/framework/src/Illuminate/Routing/Router.php:708
[0x00007f0689a15be0] Illuminate\Routing\{closure}() /XXX/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:139
[0x00007f0689a15b60] call_user_func() /XXX/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:139
[0x00007f0689a15ab0] Illuminate\Pipeline\{closure}() /XXX/app/Http/Middleware/CheckLogin.php:79
[0x00007f0689a15660] handle() /XXX/vendor/laravel/framework/src/Illuminate/Pipeline/Pipeline.php:124