Kyle Wheeler wrote:
On Tuesday, September 4 at 08:26 PM, quoth Russell E. Meek:
OS related tweaks, probably not. However you could utilize a imap
proxy such as up-imapproxy which if using FreeBSD is in ports.
Visit: http://www.imapproxy.org/ to learn more.
This should relieve the load on Dovecot.
We found that on our server, *not* using imapproxy improved our
performance. We used to use imapproxy to great effect when we were using
BincIMAP, but Dovecot is so darn fast (and caches its own
authentication) that all imapproxy added was additional inter-process
communication (translation: slower than just using Dovecot alone).
~Kyle
My understanding is that webmail clients like squirrelmail open, then
close connections on each http transaction that requires a connection to
the imap server, so imapproxy's caching of connections saves you having
to re-open connections to the backend server. That's essentially why my
original question included "what about time_wait", since I was concerned
that squirrelmail could leave a LOT of connections in a TIME_WAIT state.
Thanks for your other suggestions,
Ken
--
Ken Anderson
Pacific.Net
