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From: alan@shodha.dec.com ( Alan's Home for Wayward Notes File.)
Newsgroups: comp.unix.ultrix,comp.unix.questions
Subject: Re: Determining physical memory usage
Summary: Take a look at vmstat(1).
Message-ID: <1458@shodha.dec.com>
Date: 22 Jul 90 15:27:57 GMT
References: <3634@umbc3.UMBC.EDU>
Followup-To: comp.unix.ultrix
Organization: Digital Equipment Corp. - Colorado Springs, CO.
Lines: 27

In article <3634@umbc3.UMBC.EDU>, rostamia@umbc3.UMBC.EDU (Rouben Rostamian) writes:
> Is there a utility to determine what fraction of the physical memory 
> is being used on a machine?

	Vmstat(1) should have what you want lurking in it.  If
	not you can:

	1.  Look on gatekeeper.dec.com for something called
	    monitor.tar.Z (/pub/DEC/...).

	2.  Write you own program to go poking around kernel
	    memory.  I think the interesting data structure 
	    is called "total".
> 
> 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. 

	With only 8 MB you're almost certainly paging.  Maybe even
	a lot.  It depends on what you're doing.
> 
> --
> Rouben Rostamian                               Phone: 301 455-2458


-- 
Alan Rollow				alan@nabeth.enet.dec.com