From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161090AbWFVLtz (ORCPT ); Thu, 22 Jun 2006 07:49:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161088AbWFVLtz (ORCPT ); Thu, 22 Jun 2006 07:49:55 -0400 Received: from baldrick.bootc.net ([83.142.228.48]:17351 "EHLO baldrick.fusednetworks.co.uk") by vger.kernel.org with ESMTP id S1161086AbWFVLty (ORCPT ); Thu, 22 Jun 2006 07:49:54 -0400 Message-ID: <449A83DE.9090902@bootc.net> Date: Thu, 22 Jun 2006 12:49:50 +0100 From: Chris Boot User-Agent: Thunderbird 1.5.0.4 (Windows/20060516) MIME-Version: 1.0 To: daveflinux@aim.com Cc: linux-kernel@vger.kernel.org, linux-net@vger.kernel.org Subject: Re: Dropped TCP connections with 2.6.X kernel References: <7fc623d50606192355l799ea043hc4eacb190e6be1ce@mail.gmail.com> <1150791472.2891.164.camel@laptopd505.fenrus.org> <8C8631AA59959A1-528-3CB0@FWM-D36.sysops.aol.com> <8C863E49608F8CC-184C-2F8D@FWM-D28.sysops.aol.com> In-Reply-To: <8C863E49608F8CC-184C-2F8D@FWM-D28.sysops.aol.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org daveflinux@aim.com wrote: > Hi, > > We're using a 2.6.X kernel, > and are experiencing intermittent dropped connections when the number > of concurrent connections exceeds ~ 1000. > > Does anybody have any insight into what might be happening here > and/or troubleshooting techniques > for isolating the problem. > What system resources is TCP dependent on? > > Many thanks, > Dave Are all these connections handled by a single process? If so, you're probably running into the limit of open file descriptors (1024 usually). Look at 'help ulimit' to see how to increase the limit. HTH, Chris