Realtime log reporting when postfix delivers mails

[Ram]

I have a postfix server sending out mails and we are creating reports by 
parsing the maillogs using a couple of perl cron scripts
(linux machine with mysql )

Now the requirement is of realtime reporting.
I tried using rsyslog with a mysql table. But the performance is far too 
bad. Rsyslog seems to have some memory leak and it brings down the machine.

I guess realtime logging should be a very common requirement. What is 
the best way for this


Thanks
Ram