high WIO on solaris

From: raja rao <raja4list_at_yahoo.com>
Date: Mon, 17 Oct 2005 07:11:45 -0700 (PDT)
Message-ID: <20051017141146.16240.qmail@web31415.mail.mud.yahoo.com>

Hi All,    

I am using oralce 9i on Solaris 9. Today our server responded slowly and when we checked cpu usage using sar (sar -u 2 4 )  

we observed high WIO.  

$ sar -u 2 4
SunOS oracle 5.9 Generic_117171-02 sun4u 10/17/2005

09:42:14    %usr    %sys    %wio   %idle
09:42:16       0       1      88      10
09:42:18       0       1      86      13
09:42:20       0       1      88      11
09:42:22       7       7      75      10

 

I checked the high cpu consuming processes using ps -eaf. Surprisingly there is no single session using high cpu.  

How to find out which process is causing this high WIO.  

Can somebody help us. This is causing lot of troubles to us.  

Thanks in advance,
Raj                 

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Received on Mon Oct 17 2005 - 09:14:22 CDT