On Mon, Apr 11, 2005 at 06:47:37PM -0500, Tim Oudin wrote:
> I've just got the opportunity to install a second processor in a
> Debian Sarge box.  I have absolutely no experience with dual
> processor machines.  Research suggests that I need a kernel compiled
> with smp support thought the more detailed howto's I've seen are
> referring to the 2.2 kernels.

The bf kernel is for boot floppies.  You'll likely get better
performance out of the -k7-smp kernels.  For example:

kernel-image-2.4-k7-smp - Linux kernel image for version 2.4 on AMD K7 SMP

This package will install the latest 2.4 kernel that is optimized for
multiple AMD K7 processors.

-------------------------------------------------------------------------------
Package: kernel-image-2.4-k7-smp
Priority: optional
Section: base
Installed-Size: 8
Maintainer: Debian Kernel Team <debian-kernel at lists.debian.org>
Architecture: i386
Source: kernel-latest-2.4-i386
Version: 101
Depends: kernel-image-2.4.27-2-k7-smp
Filename: pool/main/k/kernel-latest-2.4-i386/kernel-image-2.4-k7-smp_101_i386.deb
Size: 2154
MD5sum: 4de6fe159a8a614ef33e9b1a5ed08615
Description: Linux kernel image for version 2.4 on AMD K7 SMP
 This package will always depend on the latest 2.4 kernel image available for
 AMD Duron/Athlon with SMP support.
 SMP (symmetric multi-processing) is needed if you have multiple processors.
-------------------------------------------------------------------------------

Notice that this package depends upon kernel-image-2.4.27-2-k7-smp.
This is what is known as a virtual package.  If you want to follow the
2.6 kernel, install kernel-image-2.6-k7-smp.

> beaker:/home/vpopmail/bin# uname -a
> Linux beaker 2.4.28-bf2.4 #1 SMP Fri Nov 19 13:51:55 AKST 2004 i686 GNU/Linux
> 
> Any insight would be much appreciated.  I'm in a bit of a hurry to
> get this done, I've just installed spamassassin/clamav/qmail-scanner
> on a server and it's getting it's butt kicked.  I'm adding some
> memory, faster drives and hopefully a second processsor.  Load
> averages are almost comical...or would be it I wasn't the admin.

I'd definitely install the optimized kernel.  Part of your problem is
qmail (memory hog), so consider postfix (many small, secure, well
crafted applications) or exim4 (embedded Perl interpretor) as an
alternative.  Also consider the following package:

-------------------------------------------------------------------------------
Package: irqbalance
Priority: extra
Section: utils
Installed-Size: 112
Maintainer: Eric Dorland <eric at debian.org>
Architecture: i386
Version: 0.12-1
Depends: libc6 (>= 2.3.2.ds1-4), debconf (>> 1.3)
Filename: pool/main/i/irqbalance/irqbalance_0.12-1_i386.deb
Size: 13888
MD5sum: bb1a52a762fe2358076149be2d31dbe6
Description: Balances irq's for SMP systems
 Daemon to balance irq's across multiple CPUs on systems with the 2.4
 or 2.6 kernel. Only useful on SMP systems.
-------------------------------------------------------------------------------

-- 
Chad Walstrom <chewie at wookimus.net>           http://www.wookimus.net/
           assert(expired(knowledge)); /* core dump */
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