> The memory limit (as Solaris is a 64bit OS) would be
> 2^64 bytes, which are roughly 16,777,216 Terabytes
> 
> I'm sure you'll agree that this will be enough for a
> while :)

No, that's _not_ the limit.  Some of the address space (virtual) may be
reserved; certainly some of the physical address space is reserved.  And
not all address lines are necessarily implemented!

OTOH, back in the days of 32-bit boxes, some had more than 4GB of RAM.

With rare exceptions, I expect that the OS limits are always >= what the 
hardware
it runs on is capable of providing.  Terabytes is not unreasonable, petabytes
may not be practical for awhile...
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