How much paging is "a lot?"
Dik T. Winter
dik at cwi.nl
Wed Jun 28 08:19:22 AEST 1989
In article <3818 at phri.UUCP> roy at phri.UUCP (Roy Smith) writes:
>
> I've been keeping an eye on our 4-Mbyte vax-11/750, trying to
> figure out if it would really help things if we added more memory...
> ..Is 64 (1k) pages/second "a lot"?
>
> Over the past few minutes, it's been at or near 0 for perhaps half the
> time, with a few peaks up in the 30-50 range. Is that "a lot"?
Well, this weekend I had a 12 hour session with a CDC Cyber 995 that gave
a total of 11,000,000+ page faults, or about 260/sec. And the machine
was not very loaded. ;-) Oh, and page size is selected at deadstart and
is 2K, 4K, 8K or 16K words (8 byte words) in size. Must have been some
disk traffic.
--
dik t. winter, cwi, amsterdam, nederland
INTERNET : dik at cwi.nl
BITNET/EARN: dik at mcvax
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