From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: Doubts about listen backlog and tcp_max_syn_backlog Date: Tue, 22 Jan 2013 10:17:50 -0800 Message-ID: <50FED7CE.1030008@hp.com> References: <20130122161038.GG4608@sociomantic.com> <1358873142.3464.3964.camel@edumazet-glaptop> <20130122165929.GH4608@sociomantic.com> <1358874800.3464.4002.camel@edumazet-glaptop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Eric Dumazet , netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: Leandro Lucarella Return-path: In-Reply-To: <1358874800.3464.4002.camel@edumazet-glaptop> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.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