OK, we just made these changes. We will have to watch it a while to see if
it starts getting bogged down. Right now everything looks OK, but usually
it takes a while for it to start acting crazy.
Trey Nolen
----- Original Message -----
From: "Jason Haar" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Thursday, May 23, 2002 4:05 PM
Subject: Re: [Qmail-scanner-general]continuing the poor performance on Q-S
1.12
> On Thu, May 23, 2002 at 11:53:42AM -0500, Trey Nolen wrote:
> > a problem, but we have just switched back to 1.01 and we are pumping out
> > deliveries like crazy.
>
> Interesting. There are only two fundemental differences between 1.01 and
> 1.12 (actually kicked in with 1.02).
>
> Sys::Syslog is used
> BAD_MIME support added.
>
> Sys::Syslog is only used when errors occur - so that shouldn't be it -
which
> leaves BAD_MIME.
>
> Now that one is interesting. It needs perl to scan every character of
every
> line in each message looking for illegal chars (\r and \0) in MIME mail
> messages. This is certainly making perl have to work harder - but enough
to
> cause your problem? I don't know. Certainly I haven't noticed it causing
> extra load.
>
> Can you make the following changes to 1.12 and try again?
>
> <line ~ 102>
>
> my $BAD_MIME='0'; #turn off BAD_MIME checks
>
>
> <line ~ 444>
>
> change:
>
> if (/\r|\0/) {
>
> to:
>
> if ($BAD_MIME && /\r|\0/) {
>
> That should stop perl searching every char.
>
>
> If that fixes your problem, then again I'd have to ask what kind of load
for
> the hardware you have is being used.
>
> The reality is that Qmail-Scanner is going to be doing MORE of these sorts
> of checks in the future - not less. The fight against viruses has now
> entered the realm of fighting broken MUA software - like Outlook. As such
we
> can't rely on generic MIME parsers (like reformime) to "do it right" -
they
> are. It's not their fault that some broken MUA doesn't handle MIME
messages
> the same way that the standards say it should. However, as one of the
> primary tasks of Qmail-Scanner is to protect such software - the Q-S will
> have to do it instead.
>
>
> --
> Cheers
>
> Jason Haar
>
> Information Security Manager
> Trimble Navigation Ltd.
> Phone: +64 3 9635 377 Fax: +64 3 9635 417
>
> _______________________________________________________________
>
> Don't miss the 2002 Sprint PCS Application Developer's Conference
> August 25-28 in Las Vegas -- http://devcon.sprintpcs.com/adp/index.cfm
>
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>
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