On Fri, 2004-02-27 at 12:53, Jeff Koch wrote:
> Does anybody have any suggestion for improving the performance of a 
> mailserver runnning qmail/vpopmail/qmailadmin/qmail-scanner/spamassassin? 

are you using spamd and having qmail-scanner call spamc?  or is it
calling spamassassin.  if the latter, change it to spamd/spamc model,
much more efficient.

> We're using a 2.4Ghz P4 with 1GB RAM and a 40GB SCSI drive. The operating 
> system is a basic RH8.0 install with the ext3 journalling file system. 
> We're handling about 50K messages/day and seem to exhausting the 
> capabilities of the server. During peak periods CPU idle time reaches 0% 
> and load averages will exceed 10.0

with ext3 you have to be careful about catchall accounts, and accounts
that nobody checks that get a lot of email.  If there are say, 25000
messages in an account and it gets 100 messages per hour, that will
bring your server performance down quite a bit.

of course, using reiserfs on the mail store will fix that problem.  I've
had over 150k emails in one account with reiserfs, and the system wasn't
even being phased as I pumped more mail at it (was load testing for a

> We would welcome any suggestions or URL's that you could point to - 
> particularly with respect to performance tuning that will work with qmail.

what is the approximate queue load, and what is your conf-split value?

do you have big-{ext-,}todo?


Jeremy Kitchen
Systems Administrator
Kitchen @ #qmail on EFNet - Join the party!
Inter7 Internet Technologies, Inc.
866.528.3530 toll free
847.492.0470 int'l
847.492.0632 fax

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