From owner-freebsd-isp@FreeBSD.ORG Tue Nov 25 10:30:14 2003 Return-Path: Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 74F4916A4CE for ; Tue, 25 Nov 2003 10:30:14 -0800 (PST) Received: from smtpout.mac.com (smtpout.mac.com [17.250.248.84]) by mx1.FreeBSD.org (Postfix) with ESMTP id A693343F3F for ; Tue, 25 Nov 2003 10:30:13 -0800 (PST) (envelope-from cswiger@mac.com) Received: from mac.com (smtpin07-en1 [10.15.16.44]) by smtpout.mac.com (8.12.6/MantshX 2.0) with ESMTP id hAPIUDDC007672; Tue, 25 Nov 2003 10:30:13 -0800 (PST) Received: from [10.1.1.193] (dpvc-68-161-244-25.ny325.east.verizon.net [68.161.244.25]) (authenticated bits=0)hAPIUCPd001313; Tue, 25 Nov 2003 10:30:12 -0800 (PST) In-Reply-To: <20031125175601.GA4988@wjv.com> References: <3FC395B3.C59E4AC3@tcworks.net> <20031125175601.GA4988@wjv.com> Mime-Version: 1.0 (Apple Message framework v606) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: <67773D2B-1F75-11D8-B94F-003065ABFD92@mac.com> Content-Transfer-Encoding: 7bit From: Charles Swiger Date: Tue, 25 Nov 2003 13:30:11 -0500 To: bv@wjv.com X-Mailer: Apple Mail (2.606) cc: freebsd-isp@freebsd.org Subject: Re: start multiple sendmail daemons from rc.conf? X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Nov 2003 18:30:14 -0000 On Nov 25, 2003, at 12:56 PM, Bill Vermillion wrote: >> Is it possible to start multiple sendmail daemons (using -C >> /different/cf) from rc.conf? > > Will this give a different perfomance than the way Sendmail forks > and runs children. I had 186 sendmail instances running last week > during a big flood of incoming mail. > > I'm curious on this point - and will having multiple daemons > improve performance? To an extent; one way that multiple sendmail daemons could help is by configuring "queue groups", which is a mechanism for splitting outgoing mail into different spools-- each being processed by its own daemon-- based on the recipient's domain. It's most useful for destination domains which you send a lot of mail to and which are somewhat unreliable (ie, their SMTP servers aren't always accepting mail). On the other hand, too many sendmail processes can thrash the system... -- -Chuck