Date: Tue, 25 Nov 2003 13:30:11 -0500 From: Charles Swiger <cswiger@mac.com> To: bv@wjv.com Cc: freebsd-isp@freebsd.org Subject: Re: start multiple sendmail daemons from rc.conf? Message-ID: <67773D2B-1F75-11D8-B94F-003065ABFD92@mac.com> In-Reply-To: <20031125175601.GA4988@wjv.com> References: <3FC395B3.C59E4AC3@tcworks.net> <20031125175601.GA4988@wjv.com>
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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
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