How to understand the iotop parameters of IO Analysis tool in Linux system

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Brief introduction:

Iotop-simple top-like I do O monitor

Iotop is a top-like tool for monitoring disk IO usage, which can be used by which program (requires 2.6.20 or later)

Installation:

The code is as follows:

Yum-y install iotop

Usage:

The code is as follows:

Iotop [OPTIONS]

Options:

The code is as follows:

-- version # shows version number

-h,-- help # displays help information

-o,-- only # shows what the process or thread is actually doing, but not all of them. You can switch to press o at any time.

-b,-- batch # runs in non-interactive mode

-n NUM,-- iter=NUM # sets the number of times to display in non-interactive mode

-d SEC,-- delay=SEC # sets the number of seconds between displays and supports non-integer values

-p PID,-- pid=PID # displays only the information of the specified PID

-u USER,-- user=USER # displays information about the process of the specified user

-P,-- processes # shows only processes, usually all threads

-a,-- accumulated # shows the total number of IO completed by each thread since iotop was started

-k,-- kilobytes # is displayed in kilobytes

-t,-- time # add a current time before each line

-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 got O summary is never printed.

Available commands (press the appropriate key after running the iotop command):

Use left and right to change the sort (arrow keys to change the sort order), and you can also use the following command:

The code is as follows:

R: reverse sort

O: switch to option-- only

P: switch to-- processes option

A: switch to the-- accumulated option

Q: exit

I: change the priority of the thread

Example:

The code is as follows:

$iotop

$iotop-b-n 3-d 5

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