因预编译资源导致的内存过度消耗

[Ed_S]

建议始终启用交换空间（swap）。启用内核的内存超用（overcommit）功能也是一个非常好的主意，它可以显著降低峰值内存需求。

请先解决这两个问题，然后再试一次。关于内存超用，请参阅：

MKJ's Opinionated Discourse Deployment Configuration

I have been running a Discourse forum with a substantial amount of content and plenty of images over the past few years. Maker Forums has over 100GB of images and over 400,000 posts, of which a substantial amount was imported, primarily from Google+, and the rest was created on the site. This post describes elements of how I eventually configured Maker Forums and, later, a few other Discourse instances. This is what I wish I knew when I got started, and which I’ve used to help others avoid some …

在诊断方面，之后检查 dmesg 中是否有 OOM（内存不足）事件会有所帮助，同时在系统卡顿时运行 vmstat 也很有用：

vmstat 5 5

以下是我的一般诊断建议：

@Ed_S

顺便提一下，如果某些功能无法正常工作且没有明显的原因，尤其是当你怀疑是内存不足时，建议检查是否触发了内存不足杀手（OOM-killer）。我推荐使用以下命令：

dmesg|egrep -i "memory|oom|kill"

编辑：为了方便起见，我将其添加到我的标准即时诊断命令列表中：

cat /etc/lsb-release
uptime
df -h /
free
vmstat 5 5
dmesg|egrep -i "memory|oom|kill"
ps auxrc