From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 22 Aug 2001 17:57:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 22 Aug 2001 17:57:38 -0400 Received: from mail.deja.com ([65.195.161.135]:60678 "EHLO mail.deja.com") by vger.kernel.org with ESMTP id ; Wed, 22 Aug 2001 17:57:22 -0400 From: "Jeff Busch" To: , Subject: [problem] RH 2.4.7-2 kernel slows to a crawl under heavy i/o Date: Wed, 22 Aug 2001 16:57:35 -0500 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Importance: Normal Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org machine: Compaq Proliant DL360 w/4GB mem, dual 36GB SCSI drives OS: RedHat 7.1 + errata updates, kernel-enterprise-2.4.7-2.i686.rpm from 'Roswell 2' Under heavy I/O (Apache and a custom C++ module which do lots of mmap and munmap calls over large data sets - 7GB total), the machine slows to a crawl. The problem persists even after live traffic to the machine ceases. A top listing shows both cpu's at 100% system. Any commands (ps, uname, whatever) take minutes to return results. The same setup on RH 6.2 with 2.4.3-ac3 works fine. Please let me know what information may be useful to debugging this problem (no oops yet), and other kernels to try; I'm looking at 2.4.8-ac9 right now. Thanks, Jeff Busch System Administrator Half.com - an eBay company