Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 12 Nov 2002 14:22:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 12 Nov 2002 14:22:37 -0500 Received: from 167.imtp.Ilyichevsk.Odessa.UA ([195.66.192.167]:47622 "EHLO Port.imtp.ilyichevsk.odessa.ua") by vger.kernel.org with ESMTP id ; Tue, 12 Nov 2002 14:22:37 -0500 Message-Id: <200211121923.gACJNap10779@Port.imtp.ilyichevsk.odessa.ua> Content-Type: text/plain; charset="us-ascii" From: Denis Vlasenko Reply-To: vda@port.imtp.ilyichevsk.odessa.ua To: Andrew Morton , alan@cotse.com Subject: Re: [BENCHMARK] 2.5.46-mm1 with contest Date: Tue, 12 Nov 2002 22:14:59 -0200 X-Mailer: KMail [version 1.3.2] Cc: linux-kernel@vger.kernel.org, vs@namesys.com References: <3DD01B32.4A113A71@digeo.com> <3DD021D3.B7F1C511@digeo.com> In-Reply-To: <3DD021D3.B7F1C511@digeo.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 995 Lines: 21 On 11 November 2002 19:32, Andrew Morton wrote: > That sucker really works. I run my desktop machines (768M and 256M) > at swappiness=80% or 90%. I end up with 10-20 megs in swap after a > day or two, which seems about right. The default of 60 is probably a > little too unswappy. I think swappiness should depend also on mem/disk latency ratio. Imagine you have 32Gb IDE 'disk' made internally of tons of DRAM chips (such things exist). I suppose you would like to swap more to it, since access times are not ~10 ms, they are more like 10 us. Hand tuning for optimal performance is doomed to be periodically obsoleted by technology jumps. Today RAM is 1000000 times faster than mass storage. Nobody knows what will happen in five years. -- vda - 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/