From owner-freebsd-hardware Thu Sep 7 04:44:15 1995 Return-Path: hardware-owner Received: (from majordom@localhost) by freefall.freebsd.org (8.6.11/8.6.6) id EAA12731 for hardware-outgoing; Thu, 7 Sep 1995 04:44:15 -0700 Received: from Relay1.Austria.EU.net (relay1.Austria.EU.net [192.92.138.47]) by freefall.freebsd.org (8.6.11/8.6.6) with SMTP id EAA12723 for ; Thu, 7 Sep 1995 04:44:10 -0700 Received: from shraero.UUCP by Relay1.Austria.EU.net with UUCP id AA28293 (5.67b/IDA-1.5 for freebsd-hardware@freebsd.org); Thu, 7 Sep 1995 13:44:03 +0200 Received: from analog.co.at. by shraero.co.at (5.0/SMI-SVR4) id AA09256; Thu, 7 Sep 1995 12:17:08 +0200 Received: by analog.co.at. (4.1/SMI-4.1) id AA20614; Thu, 7 Sep 95 12:18:28 +0200 Date: Thu, 7 Sep 95 12:18:28 +0200 From: kaufmann@analog.shraero.co.at (Roland Kaufmann SCHRACK AEROSPACE) Message-Id: <9509071018.AA20614@analog.co.at.> To: freebsd-hardware@freebsd.org Subject: Swap vs RAM space Content-Length: 752 Sender: hardware-owner@freebsd.org Precedence: bulk -Vince- (-Vince-) wrote: ... -Vince-> Hmmm, is there like a way to do well with a big swap and -Vince-> like 16 megs of physical memory? How much physical memory is -Vince-> on the machine with 400 meg swap? It depends on your application(s), but if you have a single memory-hungry program with bad locality, as my experience with digital circuit simulation indicates, performance decreases dramatically once your virtual memory requirements exceed the available RAM. We are talking about orders of magnitude here. For example, when I upgraded my machine from 16 to 64 M, simulation time shrank from days to hours! best regards Roland Kaufmann