Subject: Re: Virtual Memory Subsystem
To: Jukka Marin <firstname.lastname@example.org>
From: Curt Sampson <email@example.com>
Date: 11/26/1996 11:49:57
On Tue, 26 Nov 1996, Jukka Marin wrote:
> But still, it would help with mmap() and make disk IO faster on machines
> with lots of RAM...
Well, it depends on the workload, actually. From what I've read of
the merged VM/cache systems (and I am, admittedly not the sort of
expert that John Dyson is on these matters--so if he disagrees,
he's right :-)) huge amounts of linear disk I/O can start chucking
lesser used processes out of memory, when the lesser used processes
will run again and the disk I/O won't happen again.
I've heard from people who've seen this sort of thing actually
happen on SunOS machines.
Curt Sampson firstname.lastname@example.org Info at http://www.portal.ca/
Internet Portal Services, Inc.
Vancouver, BC (604) 257-9400 De gustibus, aut bene aut nihil.