Performance with postfix

[JC Putter]

Hi i am busy testing what load my mailscanner box can handle.

i am running an intel 2.4Ghz with 1GB RAM and a normal SATA HDD drive using Postfix as MTA all RBL's are in SA al running on Centos 5.2

i am using smtp-source to test sending 2000 messages at once and i not getting the results i was hoping for it, after 24 min of running there are still 1300 messages in the queue.

is the normal or bad, postfix is a fast mta, i also noticed that mailscanner scans messages in batches of 30, and it really takes a long time for the 30 messages to be placed back in the queue.

vmstat
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 0  0 187204  43488  19036  65140    1    1     7    23   73    7  5  0 94  0  0

again am i asking too much from the hardware or is there something i can do to increase performance? '

i am using a caching dns server and added 

none /var/spool/MailScanner/incoming            tmpfs    defaults       0 0
 
in fstab


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