Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964780AbVJLQSa (ORCPT ); Wed, 12 Oct 2005 12:18:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964802AbVJLQSa (ORCPT ); Wed, 12 Oct 2005 12:18:30 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:23515 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S964780AbVJLQS3 (ORCPT ); Wed, 12 Oct 2005 12:18:29 -0400 Subject: Re: Latency data - 2.6.14-rc3-rt13 From: Lee Revell To: Steven Rostedt Cc: Mark Knecht , Ingo Molnar , Daniel Walker , linux-kernel@vger.kernel.org In-Reply-To: References: <5bdc1c8b0510101316k23ff64e2i231cdea7f11e8553@mail.gmail.com> <1128980674.18782.211.camel@c-67-188-6-232.hsd1.ca.comcast.net> <5bdc1c8b0510101509w4c74028apb6e69746b1b8b65b@mail.gmail.com> <1128983301.18782.215.camel@c-67-188-6-232.hsd1.ca.comcast.net> <5bdc1c8b0510101633lc45fbf8gd2677e5646dc6f93@mail.gmail.com> <5bdc1c8b0510101649s221ab437scc49d6a49269d6b@mail.gmail.com> <5bdc1c8b0510102045u7e4bc9eeld5b690b5e96c4a5f@mail.gmail.com> <20051011111700.GA15892@elte.hu> <5bdc1c8b0510111545n29b77010h8558a1b69c4bf12a@mail.gmail.com> <1129075368.7094.3.camel@mindpipe> <5bdc1c8b0510111809v2609879ai8aa0a8e283acb58d@mail.gmail.com> <1129080062.7094.7.camel@mindpipe> Content-Type: text/plain Date: Wed, 12 Oct 2005 12:18:22 -0400 Message-Id: <1129133902.10599.10.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.4.0 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1276 Lines: 32 On Wed, 2005-10-12 at 02:38 -0400, Steven Rostedt wrote: > On Tue, 11 Oct 2005, Lee Revell wrote: > > > On Tue, 2005-10-11 at 18:09 -0700, Mark Knecht wrote: > > > Should free memory drop like that over time? > > > > Yes this is perfectly normal. When a system first boots all the memory > > your apps aren't using is initially free. As applications access more > > data over time then it will be cached in memory until free memory drops > > to near zero. > > > > "Free memory" is actually wasted memory - it's better to use all > > available RAM for caching. > > > > But the swap being touched bothers me. Although I've had problems with > leaving Mozilla up for long times and it leaking. Without Mozilla running > and running lots of other apps, I have almost 100% memory used, but 0% > swap. I believe this is the expected behavior under 2.6 unless you set /proc/sys/vm/swappiness to 0. If an app allocates memory and then never touches it then those pages will eventually be swapped out to make room for hot ones. Lee - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/