Subject: Re: Virtual Memory Subsystem To: None <tech-
kern@NetBSD.ORG> From: Michael South <> List: tech-kern Date:
12/07/1996 09:50:55 Curt Sampson wrote (originally to
port-i386): >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           Info at >Internet Portal Services, Inc.  Most
of my experience has been with HP's MPE/iX OS. It's not just
lesser-used/priority processes that are affected.  Anything that
needs pages which have not been accessed "recently" gets hosed.
They wind up waiting for pages to come in, which gives the hog a
chance to flush even more.  What are