Wayne asks:
> OK, I give up - what does 'NUMA" mean and what makes a machine a NUMA
> machine???

Non-Uniform Memory Architecture.  Basically not all of the memory in the
machine is equally addressable by all CPUs in the machine.  A Superdome
system consists of four-cpu cells that have local memory that can be
accessed at the highest speed, but they can also access memory in other
cells at a performance penalty.

So in a single-image (one instance of HP-UX) system consisting of
multiple cells, performance becomes dependent on how the system manages
memory so that the information needed by a particular CPU is located in
as close to that CPU as possible.

This obviously complicates memory (and process) management when compared
to a system where all the system memory is equally addressable by all
CPUs.

G.

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