Laravel [Troubleshooting] Cannot allocate memory 與 Class 'Monolog\Logger' not found 解法 環境狀況: Ubuntu Nginx + php5-fpm Laravel -- 這一個錯誤是在做 composer update 時所遇到的問題 --- Fatal error: Uncaught exception 'ErrorException' with message 'proc_open(): fork failed - Cannot allocate memory' in phar:///usr/bin/composer.phar/vendor/symfony/console/Symfony/Component/Console/Application.php on line 990 兩種方式: