[comp.sys.amiga.introduction] Virtual Memory

mwm@pa.dec.com (Mike (My Watch Has Windows) Meyer) (06/16/91)

In article <1991Jun14.154041.15151@world.std.com> awm@world.std.com (Andrew W MacDonald) writes:
   This seems likely.  Unless you have virtual memory, you can only run as many
   applications as will fit in main memory.

Um, well, actually, you can only have as many active tasks as will fit
in main memory unless you have demand paged virtual memory. If you're
willing to inactivate a task and swap it out, the limit is swap
space, not real memory. However, you still can't run a task bigger
than real memory.

And swapping isn't restricted to old, slow machines. Fast new machines
(like those from a little company called Cray Research) are built on
the principle of "real memory for real performance". Though they do
have a virtual memory map, they don't support demand paging, and swap.

	<mike
--
When all our dreams lay deformed and dead		Mike Meyer
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