How to find a slowdown?

[Jeremy Huber]

1) The debug output didn't seem to indicate a certain spot where it's
slow.. I can attach it if it'd help.
2) Turning the RBL lookups didn't speed it up much at all (just did
skip_rbl_lookups 1 in spam.assassin.prefs.conf)
3) I next pulled out all the extra rules_du_jour scripts out
(70_sare_adult.cf, 70_sare_random.cf, 99_sare_fraud_post25x.cf,
antidrug.cf, blacklist.cf, bogus-virus-warnings.cf, evilnumbers.cf,
local.cf, random.cf, tripwire.cf) of the /etc/mail/spamassassin
directory, and now the spam checks are up around 4500 bytes per second,
and screaming through the queue.
4) Turned back on RBL, and added all the .cf files EXCEPT the blacklist
in, and tried again, still screaming through them.
5) Added in the blacklist - slower than snot.

Ok, so the next question is: Is there a better way to do the
blacklisting?  I'm doing the spam.bydomain extra stuff, too, or I'd just
add it into the MS blacklist..

(Thanks!)
Jeremy


-----Original Message-----
From: MailScanner mailing list [mailto:MAILSCANNER at JISCMAIL.AC.UK] On
Behalf Of Jeff A. Earickson
Sent: Wednesday, October 06, 2004 11:02 AM
To: MAILSCANNER at JISCMAIL.AC.UK
Subject: Re: How to find a slowdown?


Quick advice, run MailScanner in debug mode and see what happens.
I'll bet that it gets slow on DNS lookups.  It always helps to run
a caching DNS (stealth secondary) on your mail server.

Jeff Earickson
Colby College

On Wed, 6 Oct 2004, Jeremy Huber wrote:

> Date: Wed, 6 Oct 2004 10:32:54 -0600
> From: Jeremy Huber <JHuber at MICROSOURCE.COM>
> Reply-To: MailScanner mailing list <MAILSCANNER at JISCMAIL.AC.UK>
> To: MAILSCANNER at JISCMAIL.AC.UK
> Subject: How to find a slowdown?
>
> I've got a case where our brand new server that I put MailScanner on
is
> just CRAWLING.  Dual 2.4Ghz Xeon with 4GB RAM running Fedora Core 2,
MS
> 4.33.3, and SA 2.63 (I've turned off the virus scanning temporarily).
> We only push somewhere around 50k messages a day through it, so I'm
not
> sure why it's so slow.  It almost always has hundreds of messages in
the
> inbound queue.  I tried turning on LOG_SPEED, and the spam scanning
> speed is usually around 600 bytes per second.  That seems insanely
slow,
> but I didn't what's "good."  I've got SA using DCC and Pyzor as well
as
> maybe 6 of the rulesets out of the rdj (one of which being the
> blacklist).  Am I just making SA do too much, and that's why it's so
> slow?
>
> Thanks for any help you guys can give!
>
> Jeremy
>
> --
> Jeremy Huber, SCSA, LCP
> jhuber at microsource.com
> Datacenter Engineer
> Microsource, Inc
>
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