> > Q) With spamassassin (and all the above info) you need > about 20 to 30 > > seconds per email message and LOTS of RAM and CPU: > > a) TRUE > > b) FALSE > My answer is b), False. > I have a mailserver here that has a 1Ghz CPU and 512MB RAM > and SA on that server usually takes 2 or 3 seconds per message. > Like already posted, some of your rulesets are unnecessary > because they are included in SA (standard rulesets or SURBL). > Did you check 'cat messages | spamassassin -D' to see what > part takes most time? DNS time-outs can take a lot of time > for example (also checkable with tcpdump port 53). > Also your SMTP-server (xmail?) takes a lot of cpu. I've never > used Xmail but I use postfix (and amavisd-new) and I think > it's quite memory and CPU efficient.
For a 2.4GHz Celeron with 1GB RAM, SA + Postfix hooked to a mysql DB I second that! However on slow boxes I've seen SA doing 15seconds tests but CPU never climbed to 20-30%. The tests took so long because of a mixture of rulesets for SA < v3.x and SA >= v3.x. After cleaning up the mess perfomance gain was here immediately. If there are problems with dns, you are advised to use a DNS cache right on the SA box or at least one that's physically in the same network / subnet. Philipp
