From owner-freebsd-questions Sat Aug 5 21:19:29 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.11/8.6.6) id VAA24114 for questions-outgoing; Sat, 5 Aug 1995 21:19:29 -0700 Received: from Root.COM (implode.Root.COM [198.145.90.17]) by freefall.cdrom.com (8.6.11/8.6.6) with ESMTP id VAA24108 for ; Sat, 5 Aug 1995 21:19:27 -0700 Received: from corbin.Root.COM (corbin [198.145.90.34]) by Root.COM (8.6.11/8.6.5) with ESMTP id VAA06346; Sat, 5 Aug 1995 21:18:42 -0700 Received: from localhost (localhost [127.0.0.1]) by corbin.Root.COM (8.6.11/8.6.5) with SMTP id VAA00986; Sat, 5 Aug 1995 21:20:11 -0700 Message-Id: <199508060420.VAA00986@corbin.Root.COM> To: Marc Ramirez cc: questions@freebsd.org Subject: Re: VM question In-reply-to: Your message of "Sat, 05 Aug 95 20:33:00 EDT." From: David Greenman Reply-To: davidg@Root.COM Date: Sat, 05 Aug 1995 21:20:10 -0700 Sender: questions-owner@freebsd.org Precedence: bulk >I have a friend (samman@cs.yale.edu) who is running an IBM ThinkPad 500 >with 12MB RAM/10MB swap, FreeBSD 2.0.5R. In the course of running X, he >is getting out-of-swap errors, but is not using more than 15MB of VM >ever. We just upgraded this from 1.1.5.1, and I remember a lot of >discussion about the overcommit algorithms, and I was wondering if either >John Dyson or David Greenman could explain away this behavior. Also, if >this is the expected behavior, is there a #define to change it or could >someone point me to the correct place to hack? If you are using 15MB of virtual memory then over time the system can potentially page out a large part of that in favor of file caching. -DG