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From Marc Slemko <ma...@znep.com>
Subject Re: Holy FUD Batman!
Date Wed, 14 Apr 1999 03:36:25 GMT
On Tue, 13 Apr 1999, Dean Gaudet wrote:

> Oh this is on NT.
> 
> Read the 4th paragraph at that URL.

No, the Apache is on Linux.

> 
> Dean
> 
> On Tue, 13 Apr 1999, Dean Gaudet wrote:
> 
> > MaxClients 150.
> > 
> > Read the first paragraph at
> > http://www.apache.org/docs/misc/perf-tuning.html.

They set MaxClients to 290 after recompiling Apache.

>From their site:

     number of threads number of reqs/sec
=====================  =====================
                    2  12
                    32 199
                    64 403
                    96 601
                   128 802
                   160 1,000
                   192 287
                   224 68
                   256 78
                   288 87

That just doesn't make sense to me.

It appears that x threads are running on x/2 systems, with each running
two threads.

I can't imagine why, on a machine using 960 megs with 290 MaxClients,
you would hit that drop at 160.  Nothing about the Apache architecture
imposes any such limits.  Unless it just has to do with the test
set and one machine being able to cache the whole thing while the
other couldn't.  However, without having more details about the
behaviour of the machine under such situations (eg. swapping, out
of CPU, etc.), it is impossible to tell.

Unless it is like SMP issues with 4 processors or something.


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