On Tue, Feb 03, 2009 at 09:10:50PM +0100, Rocco Scappatura wrote:
> >> I fear that the problem is that for each session I can have an unsettled
> >> number of messages sent over that session (It could be happen? If yes,
> >> It could be depend on MTA settings?) other then an unsettled size of
> >> SMTP traffic (which it determs the latency of messages and it could make
> >> congestion of postfix active queue more or less heavy).
>
> Could someone give me some hint about this issue?
I have no idea what "this issue" is, and I doubt anyone else does either.
Unless you can present concrete information, rather than vague guesses,
it is unlikely that you will get much help.
Postfix is an I/O bandwidth limited MTA, running within fixed concurrency
limits. When you add content filters, the filters may become CPU-limited.
Throughput = Concurrency / Latency.
If you are seeing low throughput, but the system has enough resources
to provide more throughput, your concurrency may be too low, or your
delivery agents are all tied up timing out deliveries to dead destinations
(abnormally high latency).
If you have run out of CPU, I/O or network bandwidth, add more hardware,
or reduce demand for that resource.
Sadly, you have to find the reason you are experiencing congestion, and
quantify this with relevant measurements.
--
Viktor.
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