Colin Dick wrote:
As far as I can tell, I am getting more mail than I am able to
process through the memory based queue during peak times and the messages
are getting dumped to the disk based queue.
Many of courier's default settings are too low for a large scale server.
My first suggestion would be to use the default
queuefill/queuehi/queuelo settings, and instead increase the values of
MAXDELS in /etc/courier/module.local and /etc/courier/module.esmtp.
After you've found good values for MAXDELS, then consider playing with
the other settings if you need to.
I have many message (mostly
bounce messages to spoofed senders) that are old and are taking up the
space in the memory queue when it reloads due to my queuefill value (15m).
You might consider using my "pythonfilter" with the dialback module.
This should eliminate mail "from" undeliverable addresses:
http://phantom.dragonsdawn.net/~gordon/courier-patches/courier-pythonfilter/
How would I reserve some space in the memory queue for new local
deliveries? In other words prioritize for the local users on the box.
I believe local deliveries are already given priority. Check the
PRIORITY value in module.local.
The computer is a P4 1.60GHz (cpu MHz : 1615.935) running on
RH9.0. We recently doubled the RAM from 512 to 1G which helped the speed
of Squirrelmail, however, the queue just won't process fast enough.
The other possibility you might consider is this:
If the one system just isn't fast enough, branch out. Export /home on
the existing system, and then set up an identical machine running all of
the same software (you'll need new RAV licenses, and I'm not sure how
you'll handle that situation), but mount /home from the other box. Make
this an alternate MX either by adding its IP address to the hostname
currently listed as your MX, or by adding a new hostname to your
domain's MX records with a priority equal to the server you're currently
using. This way you can balance the work across several machines for
better performance. I favor the approach of using multiples IP
addresses for the hostname in your MX record because then your users
will also balance their POP/IMAP sessions across the cluster.
Good luck.
8 messages in net.sourceforge.lists.courier-usersRe: [courier-users] Newbie: mail queu...
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