nginx cache放到内存
创建cache目录
mkdir -pv /var/cache/nginx/fastcgi_cache
修改/etc/fstab文件
tmpfs /var/cache/nginx/fastcgi_cache tmpfs defaults,size=200m,context=system_u:object_r:httpd_cache_t:s0
挂载文件
mount -t ramfs none /var/cache/nginx/fastcgi_cache