I was hoping someone could help me understand how the memory
is allocated in XEN. I have 147GB of ram in each server but doing the math of
what we should be able to achieve for VM’s and what we actually get is a different
story. All of our VM’S are Windows based and assigned 512 MB with
the ability to go up to 1024 MB. I do have memory ballooning turned but not
allocating a fixed amount of ram to the DOMU on the bootloader. I seem to be
maxing out at 39 to 40 machines and then performance is horrible and it appears
I may be out of ram. So I was hoping someone could explain how memory
works and where it is allocated out so I can better understand where it
is going and fix my math or at least point me to document that explains memory
allocation.
Thanks in advance Joe
