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Old 02-16-2006, 12:10 AM   #1
mynameisjohnny
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What is iowait?


Can someone tell me what is iowait and what is it's purpose on a server?
 
Old 02-16-2006, 06:34 PM   #2
gilead
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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.
 
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Old 07-27-2010, 05:23 AM   #3
ejd021
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Thumbs up Ans:

Hi,

%iowait:

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

OR

# iostat

OR

# sar



Regards
ejd021
http://ejd021-linux.blogspot.com/
 
  


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