Joey wrote: > > Hello All, > > > > I’m trying to understand this a little better. I read > http://www.postfix.org/STRESS_README.html and have an ok idea about > whats happening. > > > > I see several of these when watching top. > > smtpd -n smtp -t inet -u -o stress > > > > I can tell you we get about 10K messages an hour on average on this > box, 98-99% spam of course. > > That 10K doesn’t include the 1.3 connections we block at the firewall > level with some CIDRs. > > The sad part is we don’t have all that many users on this box, but > that’s the nature of spam. > > > > Anyway, I’m trying to better understand what the smtpd -n smtp -t inet > -u -o stress is really >
Does it say "-o stress=" OR "-o stress=yes"? The former means it has support but not using, the latter is USING. > telling me. > > Is there anything else I can do to reduce the stress that the system > is apparently under? > > > > I was also debating adding -o stress=yes into my master.cf, but I’m not sure > that’s the best way to go. > > Any help appreciated! > > Joey > > > > > > For reference if I execute ps ax|grep smtpd I get back between 60-85 > smtp processes: > I count about 25 smtpd sessions and a lot of spawn and related smtpd-policy processes. This is not a tremendous amount of smtpd processes. Are your delays high for delivered messages? For more help, answer all questions listed above and including: postconf -n? Logs? Warnings? (see http://www.postfix.org/DEBUG_README.html#logging) * Postfix 2.3 and later logs a warning that all server ports are busy: Oct 3 20:39:27 spike postfix/master[28905]: warning: service "smtp" (25) has reached its process limit "30": new clients may experience noticeable delays Oct 3 20:39:27 spike postfix/master[28905]: warning: to avoid this condition, increase the process count in master.cf or reduce the service time per client Brian > > postfix 27167 0.0 0.0 3820 952 ? S Oct08 0:00 spawn > -n policy -t unix user=nobody argv=/usr/bin/perl /usr/sbin/smtpd-policy.pl > > nobody 30304 0.1 0.6 8476 6560 ? Ss 02:43 0:00 > /usr/bin/perl /usr/sbin/smtpd-policy.pl > > postfix 30306 0.0 0.1 6628 1988 ? S 02:44 0:00 smtpd > -n smtp -t inet -u -o stress >
