Re: Solaris Dual Core CPU

Colin Dawson wrote: > We have just upgraded our servers from 16 CPU Sun 6800's to 24 CPU Sun > 6900's; This is an O/S and hardware enhancement in which all of the new > CPU's are dual core. Theoretically there are 32 CPU's in each server, > even though there is only space for 24 physical CPU's. My question is, > should I use the number of physical CPU's -1 in the onconfig file or the > number of virtual CPU's -1 ? > > I'd like to use 31 - it sounds a lot better than 23 :) If you have 24 dual core chips in your machine - to me that corresponds to 48 CPUs. Anyway, I would set "VPCLASS cpu,num=24,max=48,noage" so that IDS starts up with 24 CPUVPs. Then use 'onmode -p +x cpu' to dynamically change the number of CPUVPs where 'x' is the number of VPs you want to add. Test and see if you get better performance. Ofcourse you can also reduce the number of CPUVPs using '-x'. Claus