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From Ben Laurie <...@gonzo.ben.algroup.co.uk>
Subject Re: Real World Webserver Performance
Date Fri, 16 Feb 1996 07:28:38 GMT
> 
> On Wed, 14 Feb 1996, Ben Laurie wrote:
> > It occurs to me that the best measure of Webserver performance is to examine
> > the facts in the real world. The easy way to accomplish this would be to
> > run a survey. The questions to ask, I imagine, would be:
> > 
> > 1. Server s/w, version
> > 2. OS, version, kernel configuration (nonstandard parts thereof)
> > 3. Processor, speed
> > 4. RAM
> > 5. Disk occupied by web pages (size, number of files)
> > 6. Number of hits/day
> > 7. Number of MB/day
> > 8. Processor load (min, max, ave) [if there's a decent way to measure this].
> > 9. Response time for a local minimal page load.
> > 
> > Any thoughts?
> 
> Our webserver is current I/O bound, and just about anything you can think 
> of affects I/O.  We found out today most of the I/O had nothing to do 
> with user-level disk accesses, but instead with file last-accessed time 
> updating.  Or so we think.  :)  Every 30 seconds, when the disk cache is 
> flushed, we see a huge spike in I/O, which constant running of "sync" 
> eliminates, so we'll see tomorrow at 11am PST (our heaviest time and the 
> only time we have a problem) if turning that off helps things.  
> 
> The point is that there are many other hardware and software related 
> variables when looking at server performance.  Any benchmarking suite 
> *must* only allow comparisons between the exact same hardware/software 
> combination (down to the vendor of the disk controller card) and the 
> exact same tests.  Netscape boasts of getting 40 million hits a day, but 
> they don't say if that's one box or 40....

Yeah, does anyone know how fast their Internet pipe is?

Cheers,

Ben.

> 
> 	Brian
> 
> --=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--
> brian@organic.com  brian@hyperreal.com  http://www.[hyperreal,organic].com/
> 

-- 
Ben Laurie                  Phone: +44 (181) 994 6435
Freelance Consultant        Fax:   +44 (181) 994 6472
and Technical Director      Email: ben@algroup.co.uk
A.L. Digital Ltd,           URL: http://www.algroup.co.uk
London, England.

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