swap 跑满了

composer安装 overtrue/laravel-wechat:~4.0 报错

vagrant@homestead:~/code/larabbs1.test$ composer require "overtrue/laravel-wechat:~4.0"
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 9 installs, 0 updates, 0 removals
  - Installing easywechat-composer/easywechat-composer (1.1.4): Downloading (conDownloading (100%)
    proc_open(): fork failed - Cannot allocate memory
    The archive may contain identical file names with different capitalization (which fails on case insensitive filesystems)
    Unzip with unzip command failed, falling back to ZipArchive class
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
  [ErrorException]
  proc_open(): fork failed - Cannot allocate memory
require [--dev] [--prefer-source] [--prefer-dist] [--no-progress] [--no-suggest] [--no-update] [--no-scripts] [--update-no-dev] [--update-with-dependencies] [--update-with-all-dependencies] [--ignore-platform-reqs] [--prefer-stable] [--prefer-lowest] [--sort-packages] [-o|--optimize-autoloader] [-a|--classmap-authoritative] [--apcu-autoloader] [--] [<packages>]...

根据提供的链接，https://getcomposer.org/doc/articles/troub... ，
执行 free -m

vagrant@homestead:~/code/larabbs1.test$ free -m
              total        used        free      shared  buff/cache   available
Mem:           1993         816         921          62         255         955
Swap:           979         977           2

用满了，然后根据链接里面提供的命令，创建新的交换分区文件，扩大交换分区。
需要注意的一点，重启homestead之后这个交换分区文件的挂载就消失了，重新执行链接里面的命令

/sbin/mkswap /var/swap.1
/sbin/swapon /var/swap.1