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From: rostamia@umbc3.UMBC.EDU (Rouben Rostamian)
Newsgroups: comp.unix.ultrix,comp.unix.questions
Subject: Determining physical memory usage
Message-ID: <3634@umbc3.UMBC.EDU>
Date: 22 Jul 90 02:11:35 GMT
Reply-To: rostamia@umbc3.umbc.edu (Rouben Rostamian)
Organization: University of Maryland, Baltimore County
Lines: 20

Is there a utility to determine what fraction of the physical memory 
is being used on a machine?

The closest I can come to is to execute the ps command (with
optional flags) to get the percentage of memory used by individual
processes, then add up all the percentages.  [I am not even sure
if the memory referred by ps is virtual or physical memory.]

I have a DECstation 3100 with 8MB of memory.  The reason I want to check
the memory usage is to determine whether the memory gets saturated at all,
and whether investing in additional memory modules is worthwhile. 

I tried 'man -k mem' but did not find anything useful there.
I would appreciate any pointers and suggestions.

--
Rouben Rostamian                               Phone: 301 455-2458
Department of Mathematics                      e-mail:
University of Maryland Baltimore County        rostamian@umbc.bitnet
Baltimore, MD 21228                            rostamian@umbc3.umbc.edu