On 31/03/04 10:44 +0530, Manvendra Bhangui wrote: <snip> > Sun E3500 with 6 CPU, Solaris 8, vxfs (1 terrabyte of disk space, Multiple CPUs do not help a mail server. More spindles help.
> and around 1.2 Million Users and around 27 million mails lying > on the server). The reason I wanted to try postfix was because it 27 million in your queue? In mailboxes? The same box also offers pop3/imap and content filtering? > did not unbundle mails (unlike qmail). I expected this would give > me a big performance increase over qmail because quite a lot > of mails coming to my system were to more than one user in the To, CC > headers. However the smtpd process of postfix could not handle very > high incoming rate during the peak hours (9:30 AM to 2:00 PM). I tried Sounds like you didn't configure Postifx for performance then. What was your smtpd process limit set to? > postfix for a month and gave up after plenty of user complaints. With > the EXT-TODO extension to qmail, qmail would handle the high incoming > rate easily. With very high svc_t and my disks always 100% blocked, it > made a big difference running qmail. Though the IO did not improve, but > at least the CPU came down drastically when using qmail. CPU? Postfix hardly uses CPU at all, unless you are doing content filtering within Postfix. <snip> > Another point to note that with postfix, I had a tough time with > syslogd. Postfix uses syslog() function to log everything. And syslog is > a performance PIG. with qmail you can use multilog You mean you don't understand how syslog(3) works, and how to tune performance. > http://cr.yp.to/daemontools.html > > After my experience with multilog, I encourage people to write all > error messages to stderr. multilog takes care of rest. Ugh, ugly as hell. syslog over TCP to a remote box. > > * Were you running a local dns cache, or was the resolver running on > > another box on the same switch? > > local dns cache > I see a lot of design issues in here for a badly tuned mail server. This is actually addressed in the Postfix FAQ. Devdas Bhagat ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click _______________________________________________ linux-india-help mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/linux-india-help
