Date: Tue, 25 Nov 2003 18:11:09 -0600 From: Chris Cook <ccook@tcworks.net> To: Andy Farkas <andyf@speednet.com.au> Cc: freebsd-isp@freebsd.org Subject: Re: start multiple sendmail daemons from rc.conf? Message-ID: <3FC3EF9D.E198BDBC@tcworks.net> References: <3FC395B3.C59E4AC3@tcworks.net> <20031125175601.GA4988@wjv.com> <20031126055846.X17841@hewey.af.speednet.com.au> <20031126070221.R17841@hewey.af.speednet.com.au>
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Hey Guys... any ideas on my original post that started the thread? :)
Any way to start multiple sendmail daemons using different configs from
rc.conf?
:)
Thanks,
Chris
Andy Farkas wrote:
>
> Bill Vermillion wrote:
>
> > > >So even though sendmail says it is rejecting connections
> > > >(twice!), it then goes and accepts two more! Grrr.
> >
> > Well it's sort of hard to let the far systems know they shouldn't
> > be sending any. If you look at the config file you will see that
> > when sendmail reaches a certain limit it will not accept any more
> > connections. So your resources are too low [as noted in the other
> > poster comment below] as you run out of resources before you hit
> > the limit that is in Sendmail. [see your .cf file and you could
> > set the load average where you just queue messages and the point
> > where you reject messages lower]
> >
> > > Thrash is correct and it would appear it happening from the
> > > messages above. Sendmail checks the load average each time a new
> > > request is received. If the average is above the threshold it
> > > puts out that message and doesn't handle the request. Obviously,
> > > when PIDs 71848 and 71861 were started the load average was
> > > below the threshold. Running out of swap space is never going to
> > > be a good thing. You need more memory or more swap space.
> >
> > Unless he's modified the sendmail.cf for different load values
> > and moved them too high, then he probably needs both more memory
> > and more swap space. And of course more memory means you need to
> > add more swap space.
> >
> > Until he gets more memory he can add swap space - man 8 swapon -
> > but to blame sendmail for an under powered or mis-configured system
> > is wrong.
>
> I know exactly what happened to my system. I was there watching it self
> destruct. But the beauty of FreeBSD is its stability; the box is still
> running and hasn't even been rebooted.
>
> Yep, it needs more RAM and more swap. But that aint gonna happen :)
>
> Some background on my setup: sendmail, procmail, bogofilter, and
> amavis/uvscan. sendmail receives a message, sends it to amavis which
> spawns a uvscan, then procmail bogofilters it. Works well, but is rather
> resource intensive (and as you've noticed, this box is under-resourced).
>
> If I disconnect from the 'Net for a few hours, mail gets queued upstream,
> and when I reconnect, vast quantities of email come in all at once
> spawning hundreds of processes. (the poo hits the fan at around 300 procs)
>
> My sendmail.cf has this in it:
>
> O QueueLA=3
> O RefuseLA=4
> O DelayLA=2
> O MaxDaemonChildren=16
> O ConnectionRateThrottle=3
>
> but the situation can still occur :)
>
> --
>
> :{ andyf@speednet.com.au
>
> Andy Farkas
> System Administrator
> Speednet Communications
> http://www.speednet.com.au/
>
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--
Chris
o----< ccook@tcworks.net >------------------------------------o
|Chris Cook - Admin |TCWORKS.NET - http://www.tcworks.net |
|The Computer Works ISP |FreeBSD - http://www.freebsd.org |
o-------------------------------------------------------------o
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