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From Ben Laurie <>
Subject Re: Real World Webserver Performance
Date Wed, 14 Feb 1996 17:58:16 GMT
> >
> > it can't work. There's no mention of the type of requests handled by
> > the server (plain HTML, CPU or I/O intensive CGI, large mpegs...) and 
> > no mention of the type of user (mostly local, mostly modem users, mostly
> > of a shitty sprintlink line....)
> > 
> > There are too many variables IMO.
> >
> There's only one way to compare performance and that's to run the server
> on the exact same physical machine and serving the exact same sequence of
> requests with the exact same processes running at the same time.
> Easily doable really. You just have a benchmark box on which only the
> server and necessary processes to keep the server working are running and
> then you develop a benchmark program that generates those requests which
> you want performance measurements for. It's basically no different to
> how you'd write and use something like iozone.

The trouble with benchmarks is that it isn't possible to construct a benchmark
which models my exact mix of hits. Or even one which will predict performance
under my exact mix.

Also, how do you account for different h/w and OS? You end up with an
impossible number of tests.

One result that could be easily obtained from a survey would be upper limits
on performance for each platform, a useful item in itself. I'm sure there are



Ben Laurie                  Phone: +44 (181) 994 6435
Freelance Consultant        Fax:   +44 (181) 994 6472
and Technical Director      Email:
A.L. Digital Ltd,           URL:
London, England.

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