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 us...@abc.com -t us...@cde.com localhost:25 abc.com is the local server, 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 us...@abc.com -t us...@cde.com 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
