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分类: LINUX

2012-08-02 09:00:06


iotop命令是专门显示硬盘IO的命令,界面风格类似top命令。这个命令只有在kernelv2.6.20及以后的版本中才有。

1、直接yum安装,rh6的光盘里有包。
yum install iotop

2、命令参数介绍

-o, --only
       Only show processes or threads actually doing I/O, instead of showing all processes or threads. This can be dynamically toggled by pressing o.
-b, --batch
       Turn on non-interactive mode.  Useful for logging I/O usage over time.
-n NUM, --iter=NUM
       Set the number of iterations before quitting (never quit by default).  This is most useful in non-interactive mode.
-d SEC, --delay=SEC
       Set the delay between iterations in seconds (1 second by default).  Accepts non-integer values such as 1.1 seconds.
-p PID, --pid=PID
       A list of processes/threads to monitor (all by default).
-u USER, --user=USER
       A list of users to monitor (all by default)
-P, --processes
       Only show processes. Normally iotop shows all threads.
-a, --accumulated
       Show accumulated I/O instead of bandwidth. In this mode, iotop shows the amount of I/O processes have done since iotop started.
-k, --kilobytes
       Use  kilobytes instead of a human friendly unit. This mode is useful when scripting the batch mode of iotop. Instead of choosing the most appropriate unit iotop will dis‐
       play all sizes in kilobytes.
-t, --time
       Add a timestamp on each line (implies --batch). Each line will be prefixed by the current time.
-q, --quiet
       suppress some lines of header (implies --batch). This option can be specified up to three times to remove header lines.
       -q     column names are only printed on the first iteration,
       -qq    column names are never printed,
       -qqq   the I/O summary is never printed.

3、使用截图



[root@localhost tmp]# iotop -o 


iotop命令的键盘快捷键:
1、左右箭头改变排序方式,默认是按IO排序
2、r键是反向排序
3、o键是只显示有IO输出的进程
4、同样q是退出


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