Re[2]: Read Ahead Pages, etc.

Thanks to everyone for their answers on this subject. Dianne ______________________________ Reply Separator _________________________________ Subject: Re: Read Ahead Pages, etc. Author: david.ashby@workcover.nsw.gov.au at INTERNET Date: 5/14/98 10:03 AM Dianne, The calculation is: ixda-RA + idx-Ra + da-RA If the result is significantly lower than RA-pgused then the read ahead parameter is set high (you are reading more pages than you need). I try to keep the value between 5% to 10%. If the value is under 5% the read ahead is set low. Regards David Ashby ______________________________ Reply Separator _________________________________ Subject: Read Ahead Pages, etc. Author: <dianne.pendleton@autodesk.com (Dianne Pendleton)> at WCA-INET Date: 13/5/98 3:07 PM Hi. I have looked in the manuals and cannot find the calculation I am looking for. Somewhere, I had seen a simple calculation for determining if your RA parameters were set well. Here is the last line from an onstat -p: ixda-RA idx-RA da-RA RA-pgsused 5366028 0 4461898 9773662 You are supposed to add and/or subtract these numbers in a particular way and I think the goal was to be close to zero. Does anyone have this calculation? OnLine 7.23 HP-UN 10.20 Thanks, Dianne