Date: Thu, 4 Aug 2005 11:06:02 +0200 From: "Sander Holthaus - Orange XL" <info@orangexl.com> To: "'Chad Leigh -- Shire.Net LLC'" <chad@shire.net>, "'David Banning'" <david+dated+1123565236.75f252@skytracker.ca> Cc: questions@freebsd.org Subject: RE: question on hosting and memory Message-ID: <!~!UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAKyp4ptCu/EW6/gcge57xl8KAAAAQAAAAgNamUK5L5EO/kS%2BmxGAhxwEAAAAA@orangexl.com> In-Reply-To: <59624E58-270B-4B38-9D5C-E7D53E7C72B0@shire.net>
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owner-freebsd-questions@freebsd.org wrote: > On Aug 3, 2005, at 11:27 PM, David Banning wrote: > >> I am running apache 1.3 with php and I find when that for each person >> who visits the site, an additional 29 meg is consumed of my measly >> 512M. Searching around, it seems like this is relatively normal. >> >> So here is my question. How do big-time servers handle these type of >> memory requirements? Presumably there are servers out there getting >> thousands of visitors at once. Do they have 29 Meg * 1000 for every >> thousand visitors? At what memory ceiling do they setup another >> server machine to handle the load? Wouldn't it require a ton of >> servers to handle a load of a thousand visitors? >> > > It all depends on what the PHP is doing. On one server I > run, the hold up is not memory, but actually processing 200 > PHP scripts with db accesses at once, even with code > acceleration products installed. > > I have a dual athlon 2800+ system with 4GB of memory. It can > handle 200-240 httpd processes (apache2) with PHP5 running > the postnuke system and phpbb2 (postnuke version). The > memory is only half used but the system load starts to go sky > high when we start to get much over 200 httpd, depending on > what mix of modules people are using, when enough processes > need to run at once. The CPU is not pegged, but the run queue gets > too long. > > I am continuing to try and tune things and improve things, > but so far this is about where we are at. Before I put a > code accelerator in (we have tested the commercial Zend one > [and still are testing] but run with eaccelerator most of the > time) we hit the wall much sooner. > > (Note that the mysql DB is on another machine on the LAN). > > Chad > >> I am nowhere in this league, but the question comes to mind because >> it seems crazy that 20 visitors to my site can clog things up, simply >> because I choose to run apache and php. >> >> I have been looking at lighttpd decrease memory usage, but I require >> url rewriting and I find the documentation for lighttpd is lacking >> is this area. >> >> Any comments or suggestions are welcome - You might want to consider LiteSpeed WebServer. They have a standard (free) version and a pro (paid) version that should perform much better than Apache and PHP. It should even perform better as Lighttpd and has the same rewriting-syntax as Apache. (In fact, it closely resembles Apache in terms of configuration). Kind Regards, Sander Holthaus
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