Re: HMC profile for an lpar of IBM i: Maximum memory

Rob,
If I remember correctly there could be a performance hit with this
approach. It has to do with how the hyper-visor manages memory overall and
I think specifically the memory block sizes it uses. I sure come Monday
those much wiser than I on the subject will set us straight :)



On Sat, Jun 11, 2016 at 6:05 PM, Rob Berendt <rob@xxxxxxxxx> wrote:

Ok, we just added a bunch of memory to our Power 8. I've really not had
time to properly set the memory in each lpar. I just upgraded the maximum
memory for each lpar by 32G and left the desired memory alone. I figure I
can change the desired memory dynamically when I catch my breath.

Is there a flaw to just whilly nilly changing the maximum memory like
this? I mean, there is a reason why you don't just change the maximum
memory for each lpar to the total on the system and just be concerned
about the 'desired memory', right?



Rob Berendt
--
IBM Certified System Administrator - IBM i 6.1
Group Dekko
Dept 1600
Mail to: 2505 Dekko Drive
Garrett, IN 46738
Ship to: Dock 108
6928N 400E
Kendallville, IN 46755
http://www.dekko.com

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