On Monday 31 Jul 2006 07:46, nik600 wrote:
> i just want to know what is the medium number of email managed from
> your email servers... to preview where is the limit of a single mail
> For example now i have an installation of postfix with mysql
> integration, vda patch and spamassassin (not as daemon)
> Actually the server manager 1000/1500 email at day and the load of cpu
> is very low (5%)
> What about your mail server?
Testing before deployment suggests our email servers are either I/O bound,
also the main email server can support more traffic than we have Internet
bandwidth committed to email so it is also network I/O bound in some sense.
I think the more usual question is how many writes to disk (that are
synchronous) can the box handle. Certainly even with cheap IDE disks this is
a lot more than 1500 emails a day (assuming your email is of a typical size
and composition). As that is usually the limiting factor for Postfix.
We don't run Spam Assassin here on the main email servers, which is pretty CPU
(and memory) intensive, but if scaling is an issue either drop Spam Assassin
entirely, or run it as a daemon. Also if running Spam Assassin restrict the
number of concurrent emails it can accept to avoid running out of memory (I
think Postfix may do this by default, but check it is working). Remember also
the more you reject with cheap tests before spam assassin, the better things