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From: mouse@uunet.UU.NET (der Mouse)
Newsgroups: comp.unix.ultrix
Subject: Re: excessive swap space requirements
Message-ID: <13289@felix.UUCP>
Date: Wed, 18-Nov-87 12:10:49 EST
Article-I.D.: felix.13289
Posted: Wed Nov 18 12:10:49 1987
Date-Received: Sat, 21-Nov-87 08:29:39 EST
References: <8550@felix.UUCP>
Sender: chuck@felix.UUCP
Reply-To: mouse@uunet.UU.NET (der Mouse)
Lines: 20
Approved: zemon@felix.UUCP

Reply-Path:


In article <8550@felix.UUCP>, zemon@felix.UUCP (Art Zemon) writes:
> [about Ultrix using the usual UNIX swap space allocater]
> For instance, we have an 8700 with 32 Mb of physical memory, 64 Mb of
> swap space that we never use because we never swap and almost never
> page, and we need MORE swap space because processes are dieing for
> lack of core (brk(2) fails)!!

How sure are you that brk() is failing for lack of swap space?  There
are three or four other reasons why it could lose.  I suspect the
likeliest is that you are running into the process size limit.  To
check this, try eating up swap space by running other things and see if
you run out of memory at the same point.

If you are hitting the size limit, try "ulimit datasize".  If that
doesn't help, you may have to rebuild your kernel with a larger limit.
I could help you do this on 4.3, but Ultrix?  Dunno, sorry.

					der Mouse

				(mouse@mcgill-vision.uucp)