From owner-freebsd-stable  Sat Aug  7 14:17:32 1999
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From: tcobb@staff.circle.net
To: Doug@gorean.org
Cc: freebsd-stable@FreeBSD.ORG
Subject: RE: continued crashes with 3.1-Stable
Date: Sat, 7 Aug 1999 17:12:34 -0400 
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"Heavy" is about 400-500 kbytes/second pushed out through
the NIC from 170-200 simultaneous apache processes.  The box
runs just apache and stronghold, with database served from a
UP PIII 550 machine that's separate.

NIC is a 3COM 3C905B.

Kernel is customized, but maxusers is set to 128 with NMBCLUSTERS
to 8192.  We never get close to using all the clusters.

Motherboard is a Supermicro P6SBU with 1GB ECC RAM.

I've pushed more traffic than this on a UP machine, with a slower
processor and less memory and the same NIC.  That leaves 
potential hardware/configuration problems being related to:
DPT controller (I've used this several times, though not an a 3.2-era
machine)
1GB memory (first time with this much memory in a box)
Dual processor 

-Troy Cobb
 Circle Net, Inc.
 http://www.circle.net

>   -----Original Message-----
>   From: Doug [mailto:Doug@gorean.org]
>   Sent: Saturday, August 07, 1999 5:06 PM
>   To: tcobb@staff.circle.net
>   Cc: freebsd-stable@FreeBSD.ORG
>   Subject: Re: continued crashes with 3.1-Stable
>   
>   
>   tcobb@staff.circle.net wrote:
>   > 
>   > I think the problem is the SMP.  I've been having frequent
>   > freezes with SMP under heavy webserver load with 3.2-R,
>   > and 3.2-S.  I'm unfortunately led to believe that FreeBSD
>   > SMP is just not ready for primetime.  Too bad the $$ we blew
>   > on a dual PIII-550 box.
>   
>   	We're having pretty good luck with our dual PIII-500 
>   boxes under pretty
>   heavy webserver load. However for various reasons we're 
>   using -current.
>   There are some other factors to consider though. What kind 
>   of motherboards
>   and nic cards are you using for example? Also, how heavy is 
>   heavy? And what
>   kind of performance tuning have you done with the kernel, 
>   etc? It is of
>   course possible that you're experiencing problems with the 
>   SMP code, but
>   there are other places to look as well.
>   
>   Doug
>   


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