MailScanner & Hyper threading

[Leen Besselink]

On Thu, 13 May 2004, pn1013 wrote:

> Hi All,
> 
> We have a MailScanner box which seems to be cursed, it’s a hyper threading
> Pentium 4 processor box with 1 gig of ram and 7200RPM disks.  The problem
> we’re seeing is that it doesn’t seem to be able to process much more than
> 5000 messages per day without having huge backlogs on the inbound queue
> regardless of what we do.
> 
> Here’s the config:
> 
[...]

> 
> The config is identical software wise to all of our other boxes but we just
> can't seem to get the box processing mail like the others which happily
> process up to 20k each with load averages rarely above 2 and mqueue.in very
> rarely backing up.
> 
> We've recently swapped the hard drives out with entirely different brands
> etc and we've also tried moving from RedHat 9 to Suse Enterprise, then to
> RedHat Enterprise, but none of these have fixed the issues.
> 

I'm not sure why you tried switching Linux distributions (different
Perl-versions, maybe ?) ?

> Has anyone else had an experience like this?  Do you have any pointers?  I'm
> almost 100% certain it's hardware but I need to prove it's not MailScanner
> or any of it's attached software.
> 

Well, I've heared that it's (sometimes ?) possible to turn off Hyper
Threading in the BIOS. If you think that might be the problem, you could
try that.

> Thanks in advance!
> 

___________________________________________________________________________________
Things should be made as simple as possible, but not any simpler. - Albert Einstein

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