[Mimedefang] Multiplexor Error

Steve Robb steve_robb at cnt.com
Thu Jul 11 15:56:01 EDT 2002


We end up processing 8K - 10K messages per day.

This machine is set up as a SMTP gateway/SPAM Filter/Virus Scanner that is
front ending our mail servers (so no local accounts). It's a Sparc Ultra 10,
512KB of memory, Solaris 9, and I've tuned it for MAX_SLAVES=6,

Per David's comment, I've been monitoring vmstat and there are definitely
times when it runs 0% idle time. I had cranked the MAX_SLAVES number down
quite low after I had made the initial mistake of thinking that more slaves
were better and had set MIN_SLAVES=15 and MAX_SLAVES=25. The results were
not pretty. <g> For the last couple of days its been set to MIN_SLAVES=2 and
MAX_SLAVES=6 with a small number of errors 

I'll probably ramp it up to MAX_SLAVES=8 and see how it performs.


-----Original Message-----
From: Weyland [mailto:nw2linux at varangiankindred.org] 
Sent: Thursday, July 11, 2002 2:21 PM
To: 'mimedefang at lists.roaringpenguin.com'; Steve Robb
Subject: Re: [Mimedefang] Multiplexor Error

On Thursday 11 July 2002 03:06 pm, David F. Skoll spake:

> On Thu, 11 Jul 2002, Steve Robb wrote:
> > only error message that I get occasionally (1 or 2 times a day) is -
> >      ...[ID 847421 mail.error] Error from multiplexor: error: No 
> > free slaves Is this something to be concerned about or am I just 
> > running into an occasional lack of resources?
> It's a lack of resources.  Your server must be fairly busy.  You can 
> try (cautiously!) increasing the maximum number of allowable slaves 
> (the default is 10).

Just out of curiosity Steve, how many 
accounts and e-mails are you processing?



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