Pascal Fortin wrote:
> If you have a system with a fixed number of zones, you can distribute the
> total
> amount of memory to the zones except what you want to reserve. If you don't
> know
> how many zones you will have or on which system your zone will be run, you
> can't
> easily manage how many memory you will cap to your zone. Also, when you use
> memory cap, you have to do it for each zone and it's a pretty workload when
> you
> have 800 zones in production. It could be better to have, let say, a kernel
> parameter to reserve memory. It's a reverse thinking. The zones won't be
> allowed
> to go up to the memory cap but not beyond what it will be reserved for the
> global zone.
>
> Thanks for the discussion we have,
One RFE we have related to this is:
6543082 zonecfg should allow specification of some resources as
percentage of system total
I actually wrote the code for this a while back, but I haven't
had time to finish the work to get it integrated. I was trying
to do that as part of a larger effort, but maybe I'll try to get it
putback as a standalone fix.
The project for memory sets is:
PSARC 2000/350 Physical Memory Control
but since it requires a major rewrite of the VM system, it is
unclear when this might be available.
Thanks,
Jerry
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