Re: onmode -F

Con Woodall wrote: > > We've been running onmode - F from a cron on a daily basis for a year. > The frequency with which a shared memory segment is freed varies. > We have gone as long as 23 days where none of the runs actually freed > a memory segment. At other times we have gone as many five consecuative days > where a memory segment is freed each day. > > Our reason for doing this was seemingly unexplained engine crashes. > Informix tech support suggested it and we have had no more of that kind > of crash since then. This is 7.11.uc1 running on AIX 3.2.5. Yes, you should ONLY be freeing memory segments if you have a memory problem. Normally you WANT OnLine to use all the memory it requires in order to maximise performance. Remember that adding a segment is an overhead in terms of performance, so if OnLine immediately adds the segments freed by your cron process, you will be impacting on performance. > On Mon, 16 Jun 1997, Zeljan Silje wrote: > > > > in "Performance Guide Version 7.2" I found recommandation to run onmode > > -F using cron facility. > > Does anyone has experience with this, and how often should I execute > > onmode -F using cron?> > I am using Informix OnLine7.22 on AIX4.2. Cheers, -- Mark. +------------------------------------------------------------------+ |Mark D. Stock - The West Solutions Group http://www.west.co.za | | The Informix FAQ is at http://www.iiug.org | |mailto:marks@west.co.za +-----------------------------------------+ |Tel: +27 11 803 2151 |If it doesn't work, force it! | |Fax: +27 11 803 2189 |If it breaks, it needed replacing anyway!| |Cell: +27 83 250 2325 |Well, that's how I code anyway! | +------------------------+-----------------------------------------+