performance with >> 9 MW of memory

[p2@porter.asl.dialnet.symbolics.com (Peter Paine)]

    Date: Fri, 6 Dec 1991 20:24-0000
    From: SWM@SAPSUCKER.SCRC.Symbolics.COM (Scott McKay)

	Date: Fri, 6 Dec 1991 14:42 EST
	From: pan@ATHENA.PANGARO.dialnet.symbolics.com (Paul Pangaro)

	I have heard second hand that performance of symbolics machines
	(certainly this was about L machines, maybe G's too, that is part of the
	question) "degrades" with more than 9 MW of memory. Anybody know
	anything about this? I have no other info

    Back in about 1986, a bug was discovered in the virtual memory system
    that caused performance to degrade in machines with tons of memory.
    It was fixed the same afternoon.  I know of no such problem any more,
    but the story of that ancient bug is sometimes told for its amusement
    value.  We have some substantially loaded machines in-house that have
    the expected performance: fast.

How loaded is loaded?
What are the limits?