linux命令——iotop

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 iotop2、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