I believe a SPAMD problem has be pinpointed with SMP kernels using hyperthreading. Look through the bug list.
<<Dan>> > -----Original Message----- > From: Jason Philbrook [mailto:[EMAIL PROTECTED] > Sent: Wednesday, December 01, 2004 10:59 AM > To: Dimitry Peisakhov > Cc: 'users@spamassassin.apache.org' > Subject: Re: spamd performance problems - again > > While the queue is building up, run a top and see what's > holding things up. dstat is another handy program for this > sort of work. > > Since it's a dual processor, I'd suggest building a 2.6 > series kernel for it, since that handles smp much nicer. > > On Wed, Dec 01, 2004 at 05:14:02PM +1100, Dimitry Peisakhov wrote: > > Hi Guys, > > > > I wrote to the list a few weeks ago asking for advice on spamd > > performance. I got some, and have implemented it, but dont > know if i'm > > seeing a performance improvement. The performance i'm > getting is far > > from other people are reporting, it seems. > > > > I'm running spamassassin 3.0.1 with postfix 2.0.11-4 on Redhat > > Enterprise linux, kernel 2.4.21-4.ELsmp. > > The box that this runs on is a dual-Xeon 1.5Ghz with 1.5gig memory. > > > > I've done lots of performance enhancing tricks, but havent > had very > > noticable success. > > I've changed the language from redhat default utf-8 to > regular US-en. > > I'm using spamc/spamd. > > I'm using a caching-only dns server on localhost. > > > > I've also played around with the max-children and > max-conn-per-child > > settings for spamd. Since i have lots of memory available i've set > > max-children to 30 amd max-conn-per-child to 250. > > Doing this hasnt increased performance though, i think. The box is > > able to process about 1msg/sec and no better, although > i've been told > > that a box of this config should be able to do about 8msgs/sec. > > > > I know that spamassassin3 pre-spawns all its children. > I've noticed > > however that when a mail queue builds up i notice only a > max of 15 or > > so working at any one time (looking via 'top'), and > sometimes none are working at all. > > > > I've got another scanner type app running on the machine as well, > > Anomy Sanitizer, which is launched from the same script as > spamc, an > > attachment deleter which doesnt actually run daemonised, > but disabling > > it completely doesnt give much of a performance boost. > > > > Currently the system is in testing, so all the mail coming in is > > actually 100% spam. This shouldnt effect spamd performance though? > > > > Can anyone give me some advice about this? At peak spam times I > > currently get mail queue build-ups of 2000+ messages, > which results in > > about 15-20min delay of message delivery, which is > somewhat unacceptable. > > > > thanks in advance, > > Regards, > > > > > > Dimitry Peisakhov > > Systems Administrator > > > > HENRY WALKER ELTIN > > 02 8875 4721 > > -- > /* > Jason Philbrook | Midcoast Internet Solutions - Internet Access, > KB1IOJ | Hosting, and TCP-IP Networks for Midcoast Maine > http://f64.nu/ | http://www.midcoast.com/ > */ > >
