Hello,
I use mod-fcgid 2.2 with Apache 2.2.9 (worker), and php 5.2.6 on a
Debian Lenny 64bits.
My fcgid conf (for tests) :
MaxProcessCount 32
DefaultMaxClassProcessCount 4
DefaultMinClassProcessCount 2
the PHP wrapper :
#!/bin/dash
export PHP_FCGI_CHILDREN=5
export PHP_FCGI_MAX_REQUESTS=1000
exec /usr/bin/php5-cgi $@
I reload Apache (apache2ctl graceful) then I access to the website,
there is 6 php-cgi process : it seems ok since PHP do a fork() to
maintain 5 children per "fcgid process". So this configuration should
allow 20 (4 * 5) simultaneous php queries, no ?
So I run ab with only five concurrent users (-n 5000 and -c 5). And I
obtain in my logs :
[Fri Feb 27 01:18:45 2009] [notice] mod_fcgid: too much
/home/xxxx/http/v2/index.php process(current:4, max:4), skip the spawn
request
The DefaultMaxClassProcessCount is reached, but why fcgid try have
launched 4 process ? Just one or two should be sufficient in the case of
five concurrent users, since each PHP process can handle 5 of them. No ?
Or maybe I misunderstood this fork feature of PHP, and FCGID can't use
this children in parallel ? But in that case, what is the interest of
this fork() ?
Thanks for any explanation,
Olivier B.
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