On Sun, Jan 31, 2010 at 10:41 PM, Mark Post <mp...@novell.com> wrote:
> Absolutely. That's why those controls are there in z/VM. I personally would > avoid using LIMITHARD unless absolutely necessary. (I'm not a performance > expert in any way, shape, or form, so take this with some salt.) If you use > LIMITSOFT, and your important Linux guest(s) aren't using the processors, > these other images will be able to use that additional capacity. I always > find it frustrating to see my lower-priority guests chugging along slowly > because of a LIMITHARD, and the whole machine is otherwise pretty idle. The reason you see a difference is because most people at the same time set the nominal share to something other than before. For most Linux on z/VM installations, LIMITSOFT is really a placebo. My experiments did not show VM64721 to make a difference for that. Rob -- Rob van der Heij Velocity Software http://www.velocitysoftware.com/ ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
