[Mimedefang] Understanding the -q flag

[Dianne Skoll]

On Tue, 5 Jan 2016 12:16:49 -0800
Amit Gupta <amit777 at gmail.com> wrote:

> So if your slave limit is 100 and they are all processing emails, but
> you need to process 500 emails that moment, does this mean 400 emails
> will be queued for processing as soon as the slaves start freeing up?

Yes.  However, with those specific numbers you're in trouble because
it's highly unlikely all 400 of the queued connections will be handled
in a timely manner.  Most likely, the senders will time out first.

The -q option is meant to be used only to slightly increase the peak
message counts that MIMEDefang can handle in the face of occasional
load spikes.  Having a -q more than about 10% of your max slave count,
or more than about 40 in absolute terms, is likely to be
counter-productive.

Regards,

Dianne.