>>> On Thu, Jun 14, 2007 at 8:41 AM, in message <[EMAIL PROTECTED]>, Eric Sammons <[EMAIL PROTECTED]> wrote: -snip- > and finally it looks > like they have set up the Linux guests with a single CPU. So in general > it looks like some design tweaking and their performance should improve.
Unless those guests are pegged at 100% CPU for that one CPU, giving them a second virtual CPU won't help, and will likely hurt. According to Rob van der Heij, adding a second CPU frequently causes the guest to not drop out of queue, and the z/VM scheduler treats it as a batch workload instead of interactive. Mark Post ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
