From: Green, Simon (Simon.Green@EU.ALTRIA.COM)
Date: Wed Mar 24 2004 - 04:55:24 EST
Are you paging at all? (vmstat)
What disks are busy - if any? (iostat) What's on those disks? What's the
disk hardware?
How much network activity do you have? This can also lead to I/O waits.
(netstat -i, or topas/nmon will show you this.)
What maintenance level are you at? (oslevel -r, or instfix -i|grep ML)
What application(s) are you running?
Have you looked at the system with nmon, topas or some other tool to see if
particular processes are causing this? (topas is supplied with AIX, so you
should have that available.)
-- Simon Green Altria ITSC Europe Ltd AIX-L Archive at https://new-lists.princeton.edu/listserv/aix-l.html New to AIX? http://publib-b.boulder.ibm.com/redbooks.nsf/portals/UNIX N.B. Unsolicited email from vendors will not be appreciated. Please post all follow-ups to the list. > -----Original Message----- > From: Tufan Sen (TS) [mailto:Tufan.Sen@GLOBAL-BILGI.COM.TR] > Sent: 24 March 2004 08:25 > To: aix-l@Princeton.EDU > Subject: wio problem > > > Hi *, > > I have a AIX 4.3.3 server with 2 CPUs. One of the CPUs is > always in wio > state. I'm sure that no large I/O operations is done > especially between > 20 and 23. I'm not familiar with AIX so I want your help to find the > reason of my problem.
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