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Subject: Re: Next performance issues
From: Dr. Walter Willmertinger (willmertingerconsys.de)
Date: Tue May 23 2000 - 08:36:22 CDT

I changed that parameter but this does not help. Can it be that if too many users do
a pop at the same time, when I send the message, that there is a locking condition
between POP and SMTP?

As I wrote before, if I cancel the send process by pressing on the "cancel" button
and press it immediately again, the mail is sent at once.

Wietse Venema schrieb:

> Dr. Walter Willmertinger:
> > We have Postfix 19991231-pl06 under SCO unixware 7.1
> > We like it very much, but sometimes, when sending a mail from a Windows Client
> > with Netscape Messenger the send takes very long time.
> > I watched now, when I pressed the send button and it did not stop, the syslog
> > file and noticed that we just got some incoming mails on the postfix server. I
> > aborted the send command in messenger.
> > When all incoming mails were received, I pressed the send button again and all
> > was finished in a single moment.
> >
> > Can it be that incoming mails block the smtp server
>
> Postfix runs only a finite number of SMTP servers at the same time
> (instead of crashing the server under peak loads like some mailers).
>
> If your machine has sufficient capacity, then you can double the
> process limit in main.cf. The default setting is:
>
> default_process_limit = 50
>
> On small machines I usually trim that down to 10-20 or so.
>
> It is also possible to specify individual process limits on specific
> Postfix subsystems. See http://www.postfix.org/rate.html#process for
> details.
>
> Wietse
>
> 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 89 580 81 81
Germany                     Fax: +49 89 588 77 6
WWW-Homepage: http://www.consys.de