Download your favorite Linux distribution at LQ ISO.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 02-16-2006, 01:10 AM   #1
LQ Newbie
Registered: Feb 2006
Posts: 1

Rep: Reputation: 0
What is iowait?

Can someone tell me what is iowait and what is it's purpose on a server?
Old 02-16-2006, 07:34 PM   #2
Senior Member
Registered: Dec 2005
Location: Brisbane, Australia
Distribution: Slackware64 14.0
Posts: 4,141

Rep: Reputation: 168Reputation: 168
As far as I know it's the time that the CPU sits idle waiting for disk I/O to complete. It's a performance statistic, but not one I know much about.
1 members found this post helpful.
Old 07-27-2010, 06:23 AM   #3
LQ Newbie
Registered: Jul 2010
Posts: 6

Rep: Reputation: 0
Thumbs up Ans:



Percentage of time that the CPU was idle during which the system had an outstanding disk I/O request.

You can get the %iowait using the following command.

# mpstat


# iostat


# sar



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
high iowait in RHES sklam Red Hat 20 12-14-2006 01:35 PM
Iowait ashley75 Linux - General 25 02-12-2006 12:41 AM
CPUs in high IOwait state despite of lack of load kvsraju Linux - Enterprise 3 11-03-2005 04:34 PM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 10:56 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration