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From Austin Gonyou <>
Subject Re: Apache 2.0 on multiproc vs single proc
Date Wed, 11 Oct 2000 19:35:10 GMT
  I'm planning to do that benchmarking. And as such, I wanted to know if 
I should even persist with wanting to, if it was an easy answer. 

>>>>>>>>>>>>>>>>>> Original Message

On 10/11/00, 1:58:45 PM, Greg Ames <> wrote 
regarding Re: Apache 2.0 on multiproc vs single proc:

> Austin,

> I believe your choice of OS is going to make more of a difference on
> your Web server's ability to scale with multiple processors than Apache
> will.  I'm thinking here of the serialization (locking) in TCP/IP in the
> Linux kernels prior to 2.4.  I've heard second hand that BSD is better
> than Linux < 2.4 with respect to SMP scalability when you get up to
> around 4 processors.  But with two processors it shouldn't be a big deal
> either way.  A dual processor board with 2 500Mhz CPUs is probably more
> MIPs per buck than a single 1Ghz board + CPU.

> We added additional serialization in the Apache 2.0 threaded MPMs to
> make certain operations thread safe.  I don't think anybody has done any
> serious benchmarking to see how this new stuff in Apache 2.0 affects SMP
> scalability.

> Greg

> Austin Gonyou wrote:
> >
> > Any info on single vs dual procs? I mainly want to know if it's a path
> > that I should pursue.
> >
> > Austin

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