From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 27 May 2001 18:09:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 27 May 2001 18:09:04 -0400 Received: from ncc1701.cistron.net ([195.64.68.38]:28688 "EHLO ncc1701.cistron.net") by vger.kernel.org with ESMTP id ; Sun, 27 May 2001 18:08:57 -0400 From: miquels@cistron-office.nl (Miquel van Smoorenburg) Subject: Re: IDE Performance lack ! Date: Sun, 27 May 2001 22:08:55 +0000 (UTC) Organization: Cistron Internet Services B.V. Message-ID: <9erttn$cak$1@ncc1701.cistron.net> In-Reply-To: <01052622193100.01317@linux.zuhause.de> <00a101c0e642$4f0791a0$52a6b3d0@Toshiba> <20010527224045.B3556@metastasis.f00f.org> <00c701c0e6d8$2b28ea40$4aa6b3d0@Toshiba> X-Trace: ncc1701.cistron.net 991001335 12628 195.64.65.67 (27 May 2001 22:08:55 GMT) X-Complaints-To: abuse@cistron.nl X-Newsreader: trn 4.0-test75 (Feb 13, 2001) Originator: miquels@cistron-office.nl (Miquel van Smoorenburg) To: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org In article <00c701c0e6d8$2b28ea40$4aa6b3d0@Toshiba>, Jaswinder Singh wrote: >I am not able to understand why Linux read and/or write harddisk after some >time (after few hours ) , harddisk read/write leds keep on glowing for few >minutes , even though nobody working on it and machine is in idle state. Are you sure it is idle. It might be running something from cron- say 'updatedb' or similar. That will cause a lot of disk i/o, and _ofcourse_ performance will be bad then - the machine is doing a lot of other things. It might also be that you don't have enough memory and the machine is swapping itself to death. Running netscape or mozilla perhaps? These are known to blow themselves up to 50-100 MB (!). That will cause the exact symptoms you're seeing. >>Have you tried 2.2.x ? >> > >yes i am taking about 2.2.12 . 2.2.12 is old. In my experience, 2.2.19 is the first really good 2.2 kernel. Especially in low-memory situations like you might be experiencing.. >And in my 2.4.2 :- 2.4.2 isn't all that good either.. 2.4.x doesn't have VM sorted out just yet >and when my machine becomes normal i got :- >9.07 MB/sec Sounds about right for a non-UDMA disk. >But my problem is why linux boxes do not response for few seconds >(sometimes) and especially during telnet/ssh it looks more worst and looks >similar to Microsoft Windows :( >there is problem in scheduling or what ? Try 2.2.19 Mike.