linux 系统监控：top 等命令

Load Average 很高，CPU和MEM占用都不高，那就是 I/O 高。
How can I tell what processes are causing high loads if they are not high-cpu usage?
使用 iostat 命令查看。

top 排序
Run top then press O p Enter
Now processes should be sorted by their swap usage
[who are swapping][who-swap]?

top 命令输出详解：Linux Real-Time Process Monitor (Top) Explained
top -o %MEM 就是按照 %MEM 字段排序。
互动模式下：As a shortcut, you can use P to sort by processor usage (CPU), M for memory, or T for time, and t to return to the tree layout.

Understanding the High Load Average root cause.

How do I find the process with the highest load?
使用 htop 命令。