Re: [Qmail-scanner-general]Error message wenn sending mail -- unable to exec qq (#4.3.0)

[Jason H. <Jas...@tr...>]

On Fri, Feb 22, 2002 at 07:30:19AM -0600, Dallas Engelken wrote:
> # echo "5000000" > /var/qmail/control/databytes
> that would limit a single SMTP session to a 5MB .

WARNING: there is no direct relationship between
/var/qmail/control/databytes and how much memory softlimit should be.

/var/qmail/control/databytes tells qmail-smtpd the max size of a mail
message it should accept - anything bigger is rejected as "too large". This
has no (direct) relationship to how much memory a virus scanner would need
to use to scan any attachments in that message.

I can send 500Mb mail messages through our systems: memory usage doesn't go
above 6Mb. Why? Because no programmer in his/her right mind would READ THE
ENTIRE FILE INTO RAM BEFORE PROCESSING IT. Pretty simple really :-) They all
do "windows" of data scans - it moves through the file a chunk at a time.
The reason the scanners use 5-7Mb RAM is mainly because that's how much
memory the program and it's pattern files need to run - the file itself is
mainly irrelevant.

-- 
Cheers

Jason Haar

Information Security Manager
Trimble Navigation Ltd.
Phone: +64 3 9635 377 Fax: +64 3 9635 417