今天給laravel安裝Excel插件提示了內存分配不足等一大堆問題：

The following exception is caused by a lack of memory or swap, or not having swap configured

Check https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors for details

PHP Warning: ?proc_open(): fork failed - Cannot allocate memory in phar:///usr/local/bin/composer/vendor/symfony/console/Application.php on line 979

Warning: proc_open(): fork failed - Cannot allocate memory in phar:///usr/local/bin/composer/vendor/symfony/console/Application.php on line 979

[ErrorException]

proc_open(): fork failed - Cannot allocate memory

然后根據錯誤提示訪問了：https://getcomposer.org/doc/articles/troubleshooting.md#proc-open-fork-failed-errors

根據提示運行了解決錯誤的命令

/bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024

/sbin/mkswap /var/swap.1

/sbin/swapon /var/swap.1

問題解決！

總結

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