RE: How I can determine if my CPU VPs are starved of CPU !

Hi Rudy, I'm just looking at my old e-mails. I'm getting complaints that our system is slow. In your e-mail below you use the formula - (usercpu + syscpu) / (seconds * numcpus) OR ACTUALLY b / (a * numcpus) Is numcpus the physical number of cpus or the number of virtual cpus ? Regards Dirk -----Original Message----- From: owner-informix-list@iiug.iiug.org [mailto:owner-informix-list@iiug.iiug.org]On Behalf Of Rudy Fernandes Sent: Thursday, January 11, 2001 12:10 AM To: informix-list@iiug.org Subject: Re: How I can determine if my CPU VPs are starved of CPU ! If you have a version of top , run it at peak period and monitor the cpu utilization of your cpu vps (oninit processes). If ALL are close to 100% (say, about 90%), you need to add cpu vps. If you already have cpuvps = number of physical cpus, you've reached your hardware limit. Alternatively, during your peak period, do the following. 1. Initialize stats (onstat -z) 2. Wait about x seconds. (x should be about 10) 3. Run onstat -p. 4. From the onstat -p and the onstat -z results, determine (a) the time difference between Stats initialization and running of the onstat -p command. (b) the amount of cpu seconds used by Informix (usercpu + syscpu). 5. Compare the two, factoring in the number of cpus - i.e b/(a*numcpus) 6. If the result is close to 1 (say, above 0.9), you need to add cpu vps. If you've run out of cpus, you've reached your hardware limit. Rudy Bector Vishwajit-CVB009 wrote: > > Hi All , > I am newbie here and as an administrator. How I can determine if I have configured enough CPU VPs , > or my hardware cannot support this CPU load exerted by server other than looking at CPU utilization) . > > Thanks in advance . > > Regards, > > Vishwajit Bector.