> -----Original Message-----
> From: IBM Mainframe Discussion List On Behalf Of Mark Zelden
>
> On Tue, 28 Jul 2009 18:01:04 +0000, Ted MacNEIL <[email protected]>
wrote:
>
> [ snip ]
>
> >I do NOT believe these parameters should be left up to the SYSPROG,
rather
> it should be the business.
> >
>
> I couldn't disagree more! See all the past discussions about
REGION=0M
> when systems were "small". There is nothing keeping an
unauthorized
> program or user trying to play with 100G of 64-bit virtual storage and
> crashing my system if I don't control it. 64-bit is a bigger place
you can
> almost imagine. You couldn't plan enough aux storage to back a
mistake
> if you wanted to.
Indeed, the combined capacity of all the DASD ever manufactured is
probably still too small to fully back even one 64-bit address space.
2^64 is a really large number!
-jc-
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