Date: Mon, 23 Aug 1999 22:14:00 -0600 From: Wes Peters <wes@softweyr.com> To: wayne@crb-web.com Cc: FreeBSD Hackers List <freebsd-hackers@FreeBSD.ORG> Subject: Re: network performance vs. linux on small transfers Message-ID: <37C21C08.93833456@softweyr.com> References: <Pine.LNX.3.95.990824002132.32282A-100000@crb.crb-web.com>
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Wayne Cuddy wrote:
>
> I am involved in a messaging system at work in which we need to send/receive
> large amounts of small (one line messages) SMTP messages. We are currently using Sendmail 8.9.3
> on HPUX.
>
> Our application sends messages down a FIFO to a daemon process that is reading from
> the FIFO. This process then connects to port 25 of the destination system and
> delivers the mail via SMTP. Currently the destination system is the local
> system so everything is done on one machine.
>
> Using HPUX we typically pass 5 messages a second. This system is a dual
> 180Mhz K class server so this is surprisingly low performance for this system.
>
> When testing on FreeBSD 3.1 we also got 5 messages a second. This system is a
> 500Mhz P3, this is also unacceptable performance.
>
> When we tested with Linux (kernel 2.2.5) we passed 15 messages a second
> consistently using the exact same P3 described above.
>
> Since the HPUX and FreeBSD numbers are so close I am wondering there is some
> performance tuning that I do not know about. Do you think the number might
> change if multiple hosts were used?
>
> The daemon that reads from the FIFO makes only one connection to the local
> Sendmail to deliver multiple messages in sequence.
Why not just fork and exec sendmail instead?
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
http://softweyr.com/ wes@softweyr.com
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