Anyone with 2.6? iowait test

I'm having a few issues with one of the servers and I am curious to find out if the iowait statistics are normal.

If anyone has a 2.6 kernel (not applicable to 2.4 since it will always remain at 0.0% or 0.1% - or alternate as in some RHEL kernels) it would be interesting to find the results of the following.

Open two shell windows. In one window do a tar of something big (enough to keep running for a dozen or so seconds).

e.g.
cd /home/
tar cf newtar.tar biguser/

and in the other windows do
top -d1 (so it updates every second).

What iowait % do you experience during the tar operation? What is your normal iowait statistics? If you have iostat, what is your average iowait?

If you could share your specification too it would be more helpful.

 

 

 

 

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