On 07/13/12 12:22, Noel Jones wrote: >> >> $max_servers = 100; >> $max_requests = 25; >> $child_timeout = 180; >> $smtpd_timeout = 120; >> > > > I suspect 100 smtpd/amavisd processes is way too many for your > hardware, preventing amavisd from responding before a timeout occurs. > > Reduce smtpd process count and amavisd $max_servers until you stop > having timeouts. > > Typical values are 3 to 10 times the number of CPUs you have, and > enough RAM to support them with no swapping. >
I should have mentioned this, but the first time this happened, I assumed it was because we had too few amavis processes. I think I raised it from 25 -> 50 -> 100 to see if it made any difference (it hasn't). I'll lower it back to 40 (this is a decent-sized server) to limit the number of variables.
