[isf-wifidog] performance and cache_lite
Menil Jean-Philippe
Jean-Philippe.Menil at univ-nantes.fr
Ven 12 Juin 02:55:36 EDT 2009
Gabe Sawhney a écrit :
> So, our auth server is running on a machine with only 512MB RAM, but I'm
> still surprised at how little it takes for it to spin out of control,
> and ultimately become non-responsive (due to swap thrashing and
> consequential skyrocketing load avg).
>
> It appears that the times that the server goes crazy is when an
> unauthenticated user at one of our hotspots blasts a pile of HTTP
> requests, each of which get forwarded to the login page. (The classic
> example is opening an RSS reader, which aggressively tries to fetch
> dozens of feeds.) But the fact that something so mundane can take out
> our server is frustrating.
>
> We weren't running Cache_Lite, so I tried installing it. I've never
> tried to understand how caching in PHP works, but setting it up wasn't
> as easy as I hoped. I installed it ("pear install Cache_Lite"), then
> set the relevant value to true in config.php, and got:
> Uncaught exception 'Exception' with message 'Component not found' in
> /var/www/wifidog-auth/wifidog/classes/Dependency.php:467
>
> We're using wifidog rev 1390. Cache_Lite works fine when I test it
> separately.
>
> So, I have two questions:
> 1) Does wifidog require a way more powerful box than I'm trying to run
> it on? (If not, what could be causing this instability we're experiencing?)
> 2) What am I missing with the Cache_Lite setup?
>
> Gabe
>
>
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Hi,
as indicated the Cache_Lite module is still experimental on wifidog.
On my server, i've installed the "php5-xcache" package, "Fast, stable
PHP opcode cacher".
Hope this help.
--
Menil Jean-Philippe
DSI de l'Université de Nantes
tél: 02 51 12 53 92
Fax: 02 51 12 58 60
Jean-Philippe.Menil at univ-nantes.fr
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