From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755040Ab3AVSRy (ORCPT ); Tue, 22 Jan 2013 13:17:54 -0500 Received: from g1t0027.austin.hp.com ([15.216.28.34]:9324 "EHLO g1t0027.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753478Ab3AVSRw (ORCPT ); Tue, 22 Jan 2013 13:17:52 -0500 Message-ID: <50FED7CE.1030008@hp.com> Date: Tue, 22 Jan 2013 10:17:50 -0800 From: Rick Jones User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121011 Thunderbird/16.0.1 MIME-Version: 1.0 To: Leandro Lucarella CC: Eric Dumazet , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Doubts about listen backlog and tcp_max_syn_backlog References: <20130122161038.GG4608@sociomantic.com> <1358873142.3464.3964.camel@edumazet-glaptop> <20130122165929.GH4608@sociomantic.com> <1358874800.3464.4002.camel@edumazet-glaptop> In-Reply-To: <1358874800.3464.4002.camel@edumazet-glaptop> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > What is important is the backlog, and I guess you didn't increase it > properly. The somaxconn default is quite low (128) Leandro - If that is being overflowed, I believe you should be seeing something like: 14 SYNs to LISTEN sockets dropped in the output of netstat -s on the system on which the server application is running. rick