What is Iotop command?

What is Iotop command?

iotop or Input/Output top is a command in Linux which is used to display and monitor the disk IO usage details and even gets a table of existing IO utilization by the process. It is used by system administrators to trace the specific process that may be causing a high disk I/O read/writes.

How do you check Iotop?

Some important iotop usage and keyboard shortcuts.

1. Move left or right arrow key to change the sorting.
2. Use –version option to see version number and exit.
3. Use -h option to see information of usage.
4. Use -r option to reverse the sorting order.
5. Use -o option to check processes or thread.

How do you log Iotop?

You can use cron task scheduling to get iotop to run every minute and log any I/O activity it detects. And put the following into that file: # Run iotop and log any detected activity. Save the file.

How check IO utilization in Linux?

If it is high, then we need to check I/O activity in Linux box using the iotop or iostat commands. By using iotop command, you can monitor the disk utilization by individual processes. You will get the following output: By typing the iotop command with o option, you will get the actual I/O activity.

How install Iotop on Linux?

Installing Iotop in RHEL, CentOS and Fedora

1. Step 1: Installing Iotop Pre-requisites. As I already said above that Iotop requires latest Kernel 2.6.
2. Step 2: Installing Iotop. To install iotop use the following yum command to install it on RHEL, CentOS and Fedora.
3. Step 3: Running Iotop.
4. Example Output.
5. Step 4: Iotop Usage.

How do I sort Iotop?

Sort Columns in Iotop

1. Hit the left and right arrow keys to change the sorting.
2. Hit r to reverse the sorting order.
3. Hit o only to see processes or threads actually doing I/O, instead of showing all processes or threads.
4. Hit p only show processes.
5. Hit a display accumulated I/O instead of bandwidth.

What is Linux Iostat?

The iostat command is used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat command generates reports that can be used to change system configuration to better balance the input/output load between physical disks.

How install Iotop Linux?

What is the iotop command in Linux used for?

iotop or Input/Output top is a command in Linux which is used to display and monitor the disk IO usage details and even gets a table of existing IO utilization by the process. It is designed in python and needs kernel modules for its execution.

Which is the best way to monitor iotop?

Use -u USER option to list all the users to monitor. Use -P option to list only processes. Normally iotop displays all threads. Use -a option to check accumulated I/O instead of bandwidth. All the above iotop options are fairly straightforward. The interface almost looks and functions exactly same as Linux top command.

How to check the usage of iotop program?

To know more usage and options about iotop program, run the following command to check the man pages. Some important iotop usage and keyboard shortcuts. Move left or right arrow key to change the sorting. Use –version option to see version number and exit. Use -h option to see information of usage.

How to monitor disk I / O usage in Linux?

Iotop is an open source and free utility similar to top command, that provides an easy way to monitor Linux Disk I/O usage details and prints a table of existing I/O utilization by process or threads on the systems.