On 05/31/2010 08:50 PM, Teh Kim Chooi wrote:
Hi guys,
i recently just setup a high volume postfix server, still in testing
mode before the server go for live, OS rhel 5.5 and postfix version 2.3.3
server with 1 quad core, 8gb ram OS on mirror disk, /var/spool/postfix
in 1+0 6 disks, all is SAS 15k disk.
my postfix configuration file will be all default setting due to still
on testing.
for my testing, i run the smtp-source for the stress test
time smtp-source -s 100 -l 409600 -m 100 -c -f [email protected]
<mailto:[email protected]> -t [email protected] <mailto:[email protected]>
localhost:25
abc.com <http://abc.com> is the local server, cde.com <http://cde.com>
which i configure on another server to receive the message within same
lan.
result is 0.5 second which looks fine,
BUT when i use the server IP instead of localhost, my performance drop
time smtp-source -s 100 -l 409600 -m 100 -c -f [email protected]
<mailto:[email protected]> -t [email protected] <mailto:[email protected]>
192.168.1.10:25 <http://192.168.1.10:25>
result is 5 seconds, which almost 10 times more.
the server now only run smtp postfix service, i stop mostly unwanted
services from the server, and i never enable any spam filter, cause
this server will be mainly sending email from a single source.
what can cause weird behavior ? please advice....
Regards,
Teh
It's hard to say without knowing postfix's attitude towards localhost
vs. 192.168.1.10.
Have you restarted postfix between these tests, to clear smtpd
connection slots and any caches ?
J.
