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From: milgr%brandeis.csnet@relay.cs.net (Marc Milgram)
Newsgroups: comp.unix.wizards
Subject: Re: paging heuristics
Message-ID: <8662@brl-adm.ARPA>
Date: Thu, 6-Aug-87 10:44:57 EDT
Article-I.D.: brl-adm.8662
Posted: Thu Aug  6 10:44:57 1987
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  I don't know about vadvise (or many other swapping heuristics).  I
remember a nice (easy) way to speed up PROLOG about 30% is to mark
pages of garbage as garbage so they are not written to disk.  PROLOG
(and LISP) use lots and lots of stack space which is frequently freed.
If You don't mark the pages as garbage, your computer will write an
essentially blank page out to the disk.  Later, it will read in this
same blank page.  If it was marked as unused (garbage), a couple of
swaps can be saved.

	-Marc Milgram