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Subject: Re: Our old problem with smtp - takes very long time
From: Walter Willmertinger (willmertingerconsys.de)
Date: Wed Oct 25 2000 - 04:27:11 CDT

I changed it (like in possibility one) and as before, we have the same
problem.
I have an idea: I know Unixware has some problems with the process limit, I
noticed this in a port of hylafax.
Maybe smtp wants to create new processes and cannot do it. Maybe there is a
missing error log for this problem?

I just checked the problem when I wanted to send an email and noticed the
coming delay.
I went to a terminal session directly on the server and did a "telnet
localhost 25"
and waited exactly the same time as the email client (about a minute or so)
until I got the prompt of "ESMTP Postfix..."
The message "connected with host" comes immediately after I sent the command
telnet.
I did a "ps -ef| wc -l" and noticed that I had 110 processes in the machine. I
already changed the MAXUP system parameter but maybe this did not work?

Wietse Venema schrieb:

> > After trying a lot with dns and different postfix snapshots, we still
> > have the same problem. When a client sends an email to our unixware
> > server, it takes sometimes about one or two minutes until the smtp
> > server responds to the request.
>
> Two possibilities:
>
> - You need to configure more SMTP server processes (edit master.cf,
> follow instructions there). This is the problem if THE SAME client
> experiences VARIABLE delays in the initial server response.
>
> - The SMTP server is unable to look up the client hostname and
> address (i.e. the naming service is misconfigured or it is hosed).
> This is the problem when THE SAME client ALWAYS experiences a long
> delay in initial server response.
>
> Wietse 

--

Mit freundlichen Grüßen,

Dr. Walter Willmertinger

CONSYS Gesellschaft für Softwaretechnologie und Systementwicklung mbH
Dr. Walter Willmertinger
Landsberger Strasse 402   EMail: willmertingerconsys.de
81241 Muenchen            Phone: +49 89 589 789 0
Germany                     Fax: +49 89 589 789 99
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