Performance between SpamAssassin 3.2.1 and 3.2.2 and 3.2.3

[Randal, Phil]

SA bug 5511 ( http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5511
) is the likely culprit, but it is a bugfix.

That fix makes SA properly use the rbl_timeout value, which the async
dns code in 3.2.x didn't before that patch was applied.

I'd think that the cause is slow rbl lookups and that the fix in 5511
aggravates the symptoms.

See http://issues.apache.org/SpamAssassin/show_bug.cgi?id=5511#c16

Still, 3.2.3 with the patch from bug 5589 is clearly the right thing to
do, plus some tweaking of rbl_timeout.

Cheers,

Phil

--
Phil Randal
Network Engineer
Herefordshire Council
Hereford, UK  

> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info 
> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
> Of Rose, Bobby
> Sent: 15 August 2007 20:09
> To: MailScanner discussion
> Subject: RE: Performance between SpamAssassin 3.2.1 and 3.2.2 
> and 3.2.3
> 
> It's not net lag or bad DNSBLs and it's not an increase I 
> rules, because
> the DNS queries that I'm using are the same.  Today, I am 
> running 3.2.3
> but using the DNS.pm from 3.2.1 and everything is running normally.
> It's not DNS caching because that is also the same here and I've been
> using re2c sa compiled body rules since the feature was 
> introduced.  My
> observations are that the issue was due to the changes in the DNS code
> change 5511 which introduced the async issues and DNS 
> completion issues
> discussed with ASN and DNS code changes in Bug 5589
>  
> 
> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info
> [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf 
> Of Richard
> Frovarp
> Sent: Wednesday, August 15, 2007 1:55 PM
> To: MailScanner discussion
> Subject: Re: Performance between SpamAssassin 3.2.1 and 3.2.2 
> and 3.2.3
> 
> Gareth wrote:
> >> -----Original Message-----
> >> From: mailscanner-bounces at lists.mailscanner.info
> >> [mailto:mailscanner-bounces at lists.mailscanner.info]On 
> Behalf Of Greg 
> >> Matthews
> >> Sent: 15 August 2007 17:56
> >> To: MailScanner discussion
> >> Subject: Re: Performance between SpamAssassin 3.2.1 and 3.2.2 and 
> >> 3.2.3
> >>
> >>
> >> given the relatively low traffic on this thread and my own 
> inability 
> >> to spot the performance issue (even tho my upgrade to 
> 3.2.2 happened 
> >> pretty
> >> recently) suggests that most people (myself included) have 
> hidden the
> 
> >> problem behind a caching DNS server. Can anyone on this thread 
> >> confirm whether or not they are using a caching DNS?
> >>     
> >
> > I am using a caching DNS server and upgraded from 3.1.8 to 
> 3.2.3 today
> 
> > and it does seem slower but I cannot really tell since our 
> mail volume
> 
> > is very low and most system maintenance does not even cause 
> the queue 
> > to build up to 30 messages.
> > I expect the majority of people are like me and have 
> servers which are
> 
> > capable of processing far more email than they currently receive so 
> > each mailscanner run only handles a few messages so it is quick
> anyway.
> >
> >   
> 3.2.x has more rules than 3.1.x. This will naturally result in a
> slowdown of processing. sa-compile is supposed to make rule checking
> quicker, so you end up in a wash there if using sa-compile.
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