[Maia-users] lost connection after CONNECT (solved?)

[Greg Woods]

On Thu, 2007-08-09 at 10:39 -0500, David Sims wrote:
> Hi,
> 
>   Not sure what the recommended relationship between the max number of
> postfix smtpd processes is versus the max number of amavisd processes

[...]

> ... so I upped the number of smtpd processes in postfix from 10 to 50
> which seemed to help....

Unfortunately, this is completely dependent on what hardware you have
and how much mail you are processing for how many users, so there is no
"typical" answer. At my site, I could build a small supercomputer out of
the stack of 64-bit dual-processor hardware RAID systems we have to
process e-mail, so I don't have too many worries about capacity. I upped
the number of incoming connections to 200 and I run 15 concurrent
amavisd processes on each of four scanning nodes. The system is barely
breaking a sweat handling the mail for our 1200 on-site users. But if
all you have is a single processor Pentium system handling all your
incoming mail, you will bring it to its knees with these settings.

The best you can do is tweak things a little at a time and see what
effect it has, which sounds like what you are already doing.

--Greg