[Mimedefang] right value for MX_MAXIMUM

Muthu N.C ncmuthu at gmail.com
Thu Jun 25 09:44:36 EDT 2015

I did not get your reply to my e-mail box and I could only see it on
the mailing list. So I am sending the info in this e-mail. Thank you
for the responses, here are few more details.

VMware guest with RHEL6.4
4 vCPU  (2x2)
FC datastore

Yes, I am using clamav,mimedefang and spamassassin. I will try to get
the info with (-T).

Talking about the performance, the issue is happening multiple times
in a day. When this happens the load is going up to 8 and sometimes
12. The cpu utilisation is not much, the iowait reaches to 12 to 30%.


On Wed, Jun 24, 2015 at 5:43 AM, Muthu N.C <ncmuthu at gmail.com> wrote:
> Hello,
> I am having the system with sendmail, mimedefang and spamassassin.
> Mimedefang is running with the below options.
> -m 2 -x 80 -y 0 -U defang -b 300 -l
> In a day I am getting the below error multiple times. By looking at
> the md-mx-ctrl rawstats, all the 80 slaves are busy at that time. We
> are receiving around 500 e-mails in a minute.
> mimedefang-multiplexor[2500]: No free slaves
> mimedefang[2517]: t5O6odRs007105: Error from multiplexor: error: No free slaves
> How much slaves should be set for this workload?
> Would increasing the MX_QUEUE_SIZE help, how much I can increase?
> Any other suggestions to overcome this issue?
> I read that the e-mails sent during this time would be retried by the
> other MTA automatically, but I am seeing it as lost.
> Thanks,
> Muthu.

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