Re: svr1 mail timeouts ...

[Stefan Kaltenbrunner <stefan(at)kaltenbrunner(dot)cc>]

Magnus Hagander wrote:
> On Sat, Aug 25, 2007 at 04:25:14PM -0300, Marc G. Fournier wrote:
> > 'k, after getting some real information from Stephan, took a look at the 
> > machine ... Postfix sets a default max # of concurrent incoming smtpd 
> > connections to 100, right now, its sitting at 91 ...
> >
> > I suspect that what is/was happening was that it was hitting 100 and stalling 
> > on the other connections, including the nagios  check ...
> >
> > I've just raised it to 256, and we'll see if that doesn't eliminate the 
> > timeouts ...
>
> Interesting (and it hasn't bitched in a while, so it looks like the right
> direction).

yeah I installed a fair bit of monitoring on that very subject over the 
weekend and it shows that we are hovering around 120 connections(less on 
the weekend) on average now.

> Any idea what's using up all those connections? 91 *incoming* connections
> is very much, especially since the box doesn't exactly *receive* a lot of
> mails (it sends a whole lot, but that's a different limit). 

I have not looked into the configuration at all - but are we doing 
something like greylisting/connection tarpitting there ?


Stefan