>As someone who is very heavy into z/VM performance once told me, "z/VM is very >good at managing large numbers of small things. It's not so good at managing >a smaller number of very large things." I tend to agree. The z/VM scheduler >isn't too happy about guests with large working sets.
There is also the issue of two levels of paging. z/VM's and the guests. This was a problem when I worked with VM/SP and MVS guests 20 years ago, and is still a problem with LINUX under z/VM, today. And, IBM's recommendation (even though some people think it's new) is still the same: assign the minimum amount of memory to each guest. Otherwise, you end up with a lot of overhead. - Too busy driving to stop for gas! ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
