Mailscanner scanning slowly

[Martin Hepworth]

Check you've turned off most of the RBL's in spamassasin...and also
run sa-update regularly.

there's some performance stuff in the wiki you should check through too.

2009/3/3 Daníel Kristinn Gunnarsson <danielg at vodafone.is>:
> DNS seems to be okay, average scan is about 3-5 secs using spamassassin -D dns < sample_spam - I'm caching DNS locally as well.
>
>
>
>
> Daniel Kristinn Gunnarsson
> Tæknimaður / Technician
> Tækniborð / Technical Support
> danielg at vodafone.is
> +354 599-9500 - 3
>
> Vodafone
> Skútuvogi 2
> 104 Reykjavík
> www.vodafone.is
>
> FYRIRVARI / DISCLAIMER
>
>
>
> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info [mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Alex Broens
> Sent: 3. mars 2009 15:18
> To: MailScanner discussion
> Subject: Re: Mailscanner scanning slowly
>
> On 3/3/2009 4:03 PM, Daníel Kristinn Gunnarsson wrote:
>> Hi there !
>>
>> Lately I've been running into some trouble with MailScanner +
>> spamassassin. Let me explain my current setup.
>>
>> I have a high-load mailserver (100k+ emails per day) that transfers
>> all emails to 2 dedicated servers running Mailscanner + spamassassin
>> for scanning. Both machines have the exact same setup:
>>
>> SLES 9.3 4gb RAM 2x 64-bit Dual Core AMD Opteron running at 2ghz
>> MailScanner 4.71.10 SpamAssassin 3.2.5 Perl 5.8.3 Postfix 2.2.6
>>
>> Both servers process almost equal amount of mail or about 50k each.
>> The problem I'm having is that while server 2 is processing 10 mail
>> scans in about ~60 secs, server 1 takes 300 secs to process them. Max
>> unscanned and max unsafe messages per scan is set to 10 messages, no
>> RBL checks set in MailScanner.conf, 10 children running and Delivery
>> method is running in Batch, changing it to queue did nothing for me.
>> I've tried lowering max children and messages per scanning batch but
>> still it takes from 5 secs to 1 minute to scan a single message on
>> server 1. CPU load goes from 0.4 to 0.8 on both servers. Any ideas,
>> thoughts, tips and tricks are appreciated.
>
> with that hardware, 50k msgs aren't heavy traffic.
>
> Could be DNS lag.
>
> Run a spam message thru spamassassin with -D dns:
>
> spamassassin -D dns < sample_spam
>
> that should make it clear if you have a DNS issue and can rule that out.
>
> Alex
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-- 
Martin Hepworth
Oxford, UK