"iostat -Cx 1" is your friend.
The -C flag will provide a rollup per controller
(c1, c2, etc) so you can determine the IO rate
on a per-controller basis (IOPS and bandwidth).
I'd start there. DTrace rocks, but you should be able
to answer this question with iostat.
/jim
Michael Brian - IL wrote:
I am pretty new to Dtrace but use the Dtrace Toolkit when trying to
troubleshoot I/O issues
On Oracle.
I am looking for help on how to do the following:
I am trying to answer whether adding more HBA Cards/ports
would be effective.
To do this, I need to know the i/o's per second
As well as total bandwidth per second.
Has anyone done this before?
Does anyone have any other ideas on how to attack this problem?
I have been tuning Oracle for quite some time now, and I am continually
Asked to prove what I tend to know naturally, that the classic 1 HBA, 2
port card
Isn't cutting it.
I also have similar discussions on whether I am saturating the BUS on a
particular box.
Brian
----------------------
Brian P Michael
Technical Management Consultant
Rolta TUSC, Inc.
micha...@tusc.com
630-960-2909 x1181
http://www.tusc.com
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