On Tue, 2007-01-30 at 19:14 -0600, Max Esquivel wrote: > I have also posted this to vchkpw list: > > I have a server with qmail running some 600 email accounts over some > 30 domains. I recently installed simscan, Spamassassin and ClamAv. > It all works really well, but during peak hours (say 300 to 500k per > sec inbound traffic) Thee server starts to bog down and progressively > gets slower and slower until 120 connections are maxed out and the > server starts rejecting smtp connections first and then pop > connections. This is a new AMD 64 bit with 1Gig Ram running on > Debian and running also Apache with php, mysql, and Horde webmail > (with very very few hits per day). If I turn off simscan, situation > returns to normal after a while. I have tried finding some > documentation about how many users and traffic qmail with simscan, SA > and Clam may handle, but it seems there is nothing out there other > than very general stuff like "many users", "thousands of users".... > > Perhaps the problem is in my setup and some configuration for > simscan, SA or clam that I have set/not set incorrectly, ot I have > not realized this number of users and trafffic is just too much for > one server. Any suggestions or links to appropriate docs will be most > appreciated. > > Thanks! > > Max Esquivel
I was having a similar issue. For my environment it was being caused by large attachments. I ended up only using simscan to call clamav and set some basic attachment blocking policy. I call SpamAssassin through procmail, but only on messages smaller than 250k to avoid scanning large media attachments. I also get user_prefs working this way. I still haven't figured out hot to get user prefs to work on aliases though. :( .darrel.