New MS install is slow to an extreme

DAve dave.list at
Wed Apr 2 20:49:08 IST 2008

Julian Field wrote:
> Start by
>    MailScanner --debug --debug-sa
> to see where the holdups are.
> Check you haven't got a screwed SpamAssassin cache as well.

I changed my virus scanner from clamavmodule to clamav and my batch time 
went from 400/600 seconds to 60/140 seconds. As the system works through 
the queue I can watch the times increase up to 200 seconds. Possibly 
because they are large batches?

I am considering removing the clamav phishing and spam checks to see if 
that helps.


> DAve wrote:
>> Not certain what is wrong here. I did a fresh clean install of FreeBSD 
>> 6.2, Julian's MS tarball and Julian's SA and Clam tarball. Everything 
>> went well, everything runs. But, now I am seeing batches like this.
>> MailScanner[58796]: New Batch: Found 2907 messages waiting
>> MailScanner[58796]: New Batch: Scanning 30 messages, 306454 bytes
>> MailScanner[56909]: Batch completed at 790 bytes per second (398241 / 
>> 503)
>> MailScanner[56909]: Batch (30 messages) processed in 503.55 seconds
>> Previously we had maybe 4 messages per batch and processed them in 2 
>> to 6 seconds. The current time to scan is killing me.
>> mailscanner-install-4.67.6-1.tar.gz
>> install-clam-0.92.1-sa-3.2.4.tar.gz
>> SA plugins enabled, all others disabled = AutoLearnThreshold, Check, 
>> Shortcircuit, Bayes, BodyEval, HTMLEval, HeaderEval, MIMEEval, 
>> RelayEval, URIEval, WLBLEval, Rule2XSBody, ImageInfo, URIDNSBL.
>> All SA rules have been compiled.
>> Bayes is enabled.
>> I have "skip_rbl_checks 1"
>> shortcircuit ALL_TRUSTED           on
>> shortcircuit BAYES_99              spam
>> shortcircuit BAYES_00              ham
>> In MS I have the following, I can send a complete conf if needed.
>> Max Children = 10
>> Queue Scan Interval = 5
>> Virus Scanners = clamavmodule
>> Delivery Method = batch
>> I don't zip attachments, I don't use MCP, I don't use Watermarks. I 
>> think I have done everything I can for speed, but I am losing ground.
>> I am running a local caching name server on each MS server.
>> Not sure where to go from here.
>> DAve
> Jules

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