From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anthony Ewell Subject: Re: slow after upgrade to CentOS 5 (RHEL5) Date: Sun, 04 Nov 2007 15:16:16 -0800 Message-ID: <472E52C0.4080604@verizon.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from vms040pub.verizon.net ([206.46.252.40]:35051 "EHLO vms040pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752045AbXKDWQh (ORCPT ); Sun, 4 Nov 2007 17:16:37 -0500 Received: from rn1.rent-a-nerd.local ([72.75.170.182]) by vms040.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0JR0000K45V5OR57@vms040.mailsrvcs.net> for linux-scsi@vger.kernel.org; Sun, 04 Nov 2007 16:16:18 -0600 (CST) Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: linux-scsi@vger.kernel.org Cc: bo.yang@lsi.com, James Bottomley , "Patro, Sumant" , Mark Harvey James Bottomley wrote: > Please don't drop the cc lists. There are others who probably have more > informed opinions than I do who won't get to comment if they don't see > it. > > On Sun, 2007-10-28 at 17:36 -0700, Anthony Ewell wrote: >> James Bottomley wrote: >>> On Sat, 2007-10-27 at 13:21 -0700, Anthony Ewell wrote: >>>> James Bottomley wrote: >>>>> On Wed, 2007-10-24 at 18:04 -0700, Anthony Ewell wrote: >>>>>> Hi All, >>>>>> >>>>>> If you all would not mind a post from the general >>>>>> public Linux user, after doing a complete disk wipe >>>>>> of CentOS 4 and installing CentOS5, my system is preceived >>>>>> to be 3 times slower. Did some test from my install CD/DVD's in "rescue mode" on Computer C. I used the same backup script (dump) that I use in normal boot mode. I stopped the backup after dump gave the first estimate of time: "dump" CentOS5 install DVD in rescue mode: transfer rate 4422 KB/s, estimated finish 4:10 "dump" CentOS4.4 (2.6.9-42.EL) install CD in rescue mode: transfer rate 8468 KB/s, estimated finish 2:09 I also got a "dmesg" from computer B, as requested by Sumant. Computer B: VXA-3, CentOS 4.5 , SATA-150-4 -T Hi All, I also tested using the System Rescue CD from http://www.sysresccd.org. I used the same backup script (dump) that I use in normal boot mode. I stopped the backup after dump gave the first estimate of time: "dump" System Rescue CD (Kernel 2.6.22.9): transfer rate 4370 KB/s, estimated finish 4:15 So, I would say, the problem is not confined to CentOS 5, but goes all the way up to the 2.6.22.9 kernel. I hope this is a good clue. -T