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From: sasaki@HARVARD.HARVARD.EDU.UUCP
Newsgroups: mod.computers.vax
Subject: PFRATL = 0 or > 0 ?
Message-ID: <8607260303.AA18710@ucbvax.Berkeley.EDU>
Date: Fri, 25-Jul-86 23:03:04 EDT
Article-I.D.: ucbvax.8607260303.AA18710
Posted: Fri Jul 25 23:03:04 1986
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One thing that I noticed about version 4, and I was glad to see others
confirm this, is that the swapper doesn't do working set trimming as
soon as it used to. On version 3 of VMS you could set PFRATL to 0 and
leave it there, trimming would work and you would see working sets get
smaller and rarely see swapping.

I usually run the VMS systems with PFRATL=0 as long as the free page
list is large. If the system gets really loaded, then I move PFRATL to
1 to 3 until the overall response improves.
----------------
  Marty Sasaki				uucp:   harvard!sasaki
  Harvard University Science Center	arpa:	sasaki@harvard.harvard.edu
  One Oxford Street			bitnet: sasaki@harvunxh
  Cambridge, MA 02138			phone:	617-495-1270