Forwarding x unscanned messages / slow scanning

[Martin.Hepworth]

Matthias

Doing a local caching nameserver will have dramatic results....someone
the IRC channel did the other day and the scan times dropped from 55secs
per batch to around 20-30.

I'd also check what RBL's you're scanning especially in spamassassin. If
you're doing all of them you may want to consider just running a couple
in SA by giving the others a zero score in
/etc/mail/spamassassin/mailscanner.cf

--
Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300

> -----Original Message-----
> From: mailscanner-bounces at lists.mailscanner.info [mailto:mailscanner-
> bounces at lists.mailscanner.info] On Behalf Of Matthias Kellermann
> Sent: 20 April 2007 12:47
> To: MailScanner discussion
> Subject: Re: Forwarding x unscanned messages / slow scanning
>
> Thanks Martin.
>
> Some facts about the machine:
>
> 1 x Intel(R) Pentium(R) D CPU 3.00GHz
> 2GByte RAM
>
> Timing cached reads:   2168 MB in  1.99 seconds = 1092.10 MB/sec
> Timing buffered disk reads:   94 MB in  3.00 seconds =  31.32 MB/sec
>
> OS: Debian Etch
>
> Here are a few things I've already done to speed things up:
> - using a ramdisk for the MS working directory
> - setting the clamav & spamassassin timeouts lower
> - lowered the max. MS processes to 3
>
> The DNS server I use is on the same network. Perhaps I'll try to use a
> local caching DNS though.
>
> Just wondering why MS is so slow about the messages that I defined in
> the scan.messages.rules not to be scanned. Any ideas?
>
> Best Regards
> Matthias
>
>
> Martin.Hepworth schrieb:
> > Matthias
> >
> >
http://wiki.mailscanner.info/doku.php?id=documentation:test_troubleshoot
> > :performance
> >
> > also
> >
> > http://wiki.mailscanner.info/doku.php?id=maq:index#optimization_tips
> >
> > I'd also ask how much RAM/ CPU you've got.
> >
> > A local caching DNS server on the computer can make a huge
difference
> > too.
> >
> > --
> > Martin Hepworth
> > Snr Systems Administrator
> > Solid State Logic
> > Tel: +44 (0)1865 842300
> >
> >
> >> -----Original Message-----
> >> From: mailscanner-bounces at lists.mailscanner.info
[mailto:mailscanner-
> >> bounces at lists.mailscanner.info] On Behalf Of Matthias Kellermann
> >> Sent: 20 April 2007 11:49
> >> To: MailScanner discussion
> >> Subject: Forwarding x unscanned messages / slow scanning
> >>
> >> Hi folks,
> >>
> >> i've a running MailScanner system with Postfix.
> >>
> >> When the queue runs full (about 250 messages) I get lots of
messages
> >> like this from MailScanner:
> >>
> >> Apr 20 12:40:39 server check[23677]: Batch completed at 895 bytes
per
> >> second (35672 / 39)
> >> Apr 20 12:40:39 server check[23677]: Batch (3 messages) processed
in
> >> 39.83 seconds
> >> Apr 20 12:40:39 server check[23677]: New Batch: Found 195 messages
> >>
> > waiting
> >
> >> Apr 20 12:40:39 server check[23677]: New Batch: Forwarding 1
unscanned
> >> messages, 1916 bytes
> >> Apr 20 12:40:39 server check[23677]: New Batch: Scanning 3
messages,
> >> 108887 bytes
> >>
> >> It needs a long time (about 30minutes) to clear the queue because
> >> MailScanner is too slow.
> >>
> >> There are lots of messages in the queue that shouldn't be scanned
> >> because I've setup a own scanning rule (scan.messages.rules). So I
> >>
> > think
> >
> >> this messages should get processed very fast by MailScanner, but
they
> >> aren't.
> >>
> >> Here are my settings in the MailScanner.conf file:
> >>
> >> Max Unscanned Bytes Per Scan = 10000
> >> Max Unsafe Bytes Per Scan = 50000
> >> Max Unscanned Messages Per Scan = 10
> >> Max Unsafe Messages Per Scan = 10
> >>
> >> Maximal MailScanner children:
> >> Max Children = 4
> >>
> >> I've got played with the Unscanned-/Unsafe-settings with no
success.
> >>
> > Can
> >
> >> you give me any hints to speed up things?
> >>
> >> Thanks in advance.
> >>
> >> Best Regards
> >> Matthias
> >>
> >> --
> >> MailScanner mailing list
> >> mailscanner at lists.mailscanner.info
> >> http://lists.mailscanner.info/mailman/listinfo/mailscanner
> >>
> >> Before posting, read http://wiki.mailscanner.info/posting
> >>
> >> Support MailScanner development - buy the book off the website!
> >>
> >
> >
> >
> >
> >
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**********************************************************************
Confidentiality : This e-mail and any attachments are intended for the 
addressee only and may be confidential. If they come to you in error 
you must take no action based on them, nor must you copy or show them 
to anyone. Please advise the sender by replying to this e-mail 
immediately and then delete the original from your computer.

Opinion : Any opinions expressed in this e-mail are entirely those of 
the author and unless specifically stated to the contrary, are not 
necessarily those of the author's employer.

Security Warning : Internet e-mail is not necessarily a secure 
communications medium and can be subject to data corruption. We advise 
that you consider this fact when e-mailing us. 

Viruses : We have taken steps to ensure that this e-mail and any 
attachments are free from known viruses but in keeping with good 
computing practice, you should ensure that they are virus free.

Red Lion 49 Ltd T/A Solid State Logic
Registered as a limited company in England and Wales 
(Company No:5362730)
Registered Office: 25 Spring Hill Road, Begbroke, Oxford OX5 1RU, 
United Kingdom
**********************************************************************