Friday, June 03, 2005

IOWait

I wrote a doc on this a bit over a year ago, have a read of

http://sunsolve.sun.com/search/document.do?assetkey=1-9-75659-1

Because of all of the misunderstanding associated with IOwait, it is

defined to be 0 in Solaris 10.

The really important thing to take away from that document is that

IOWait is a subset of idle. You only get IOwait time if there is nothing

else ready to run from the dispatch queues.

alan.

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