From owner-freebsd-hackers@FreeBSD.ORG Thu Nov 20 15:38:35 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 559D016A4E2; Thu, 20 Nov 2003 15:38:34 -0800 (PST) Received: from kientzle.com (h-66-166-149-50.SNVACAID.covad.net [66.166.149.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 05DCE43FE3; Thu, 20 Nov 2003 15:38:33 -0800 (PST) (envelope-from kientzle@acm.org) Received: from acm.org ([66.166.149.54]) by kientzle.com (8.12.9/8.12.9) with ESMTP id hAKNcRkX031061; Thu, 20 Nov 2003 15:38:27 -0800 (PST) (envelope-from kientzle@acm.org) Message-ID: <3FBD5072.7030603@acm.org> Date: Thu, 20 Nov 2003 15:38:26 -0800 From: Tim Kientzle User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.4) Gecko/20031006 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Len Sassaman References: <0C8643E8-1B1A-11D8-B160-000A959E7C72@anonymizer.com> In-Reply-To: <0C8643E8-1B1A-11D8-B160-000A959E7C72@anonymizer.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit cc: freebsd-hackers@freebsd.org cc: freebsd-current@freebsd.org Subject: Re: Help request: problems with a 5.1 server and large numbers of ssh users. X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: kientzle@acm.org List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Nov 2003 23:38:35 -0000 Len Sassaman wrote: > The problem is that after about 150 users log in (300ish sshd sessions, > since I am using privsep), incoming connections start getting dropped. That number (150) sounds awfully familiar; I feel like I've seen it somewhere recently. Hmmmm.... Try an 'fstat' when connections start getting dropped. I wonder if something (PAM module, maybe?) is opening a file on each connection and you're running out of per-process file descriptors. Tim Kientzle