Lighttpd

Hello.

I have a big problem. I configured fastcgi like this:

fastcgi.server = (
    ".pl" => ((
        "socket"   => "/var/run/lighttpd/perl-fcgi.socket",
        "bin-path" => "/usr/local/lib/cgi-bin/test_dispatcher.fcgi",
        "check-local"     => "disable",
        "max-procs"       => 10,
    ))
)

This does indeed spawn 10 processes. My test_dispatcher.fcgi is a very simple Perl script:

#!/usr/bin/perl

use CGI::Fast;

{
    while (new CGI::Fast) {
        do $ENV{SCRIPT_FILENAME};
    }
}

But, lighttpd only uses one of the spawned processes, even though there are 10 available. For example, if I put this Perl script in my document root (/var/www/test.pl):

for ( ; ; )
{ }

And then open that URL with my broser at home:

http://example.com/test.pl

then I can see that indeed one of the spawned FCGI processes is now using 100% CPU. When I open the URL another time in a new browser tab, nothing happens. A second FCGI process (out of the 10 available) isn't even handling the request. Only the first is still running. All the other processes are just sitting around, idling.

The only way to make another FCGI process run, is to open a different URL instead. For example, if I copy test.pl to test2.pl, and then open http://example.com/test2.pl, then, and only then, do I see two CGI processes running, each using 50% CPU.

This is not good. I need to have all requests to the same URL handled.

I don't know what to do here. I'm surely doing something wrong, but I can't tell what.

I'm running Debian 6.0.10 and the lighttpt that comes with it, which is "lighttpd/1.4.28 (ssl)".

My full lighttpd configuration is:

server.modules = (
        "mod_access",
        "mod_alias",
        "mod_compress",
        "mod_redirect",
        "mod_fastcgi" 
)

server.document-root        = "/var/www" 
server.upload-dirs          = ( "/var/cache/lighttpd/uploads" )
server.errorlog             = "/var/log/lighttpd/error.log" 
server.pid-file             = "/var/run/lighttpd.pid" 
server.username             = "www-data" 
server.groupname            = "www-data" 

index-file.names            = ( "index.php", "index.html",
                                "index.htm", "default.htm",
                               " index.lighttpd.html" )

url.access-deny             = ( "~", ".inc" )

static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )

include_shell "/usr/share/lighttpd/use-ipv6.pl" 

dir-listing.encoding        = "utf-8" 
server.dir-listing          = "enable" 

compress.cache-dir          = "/var/cache/lighttpd/compress/" 
compress.filetype           = ( "application/x-javascript", "text/css", "text/html", "text/plain" )

include_shell "/usr/share/lighttpd/create-mime.assign.pl" 
include_shell "/usr/share/lighttpd/include-conf-enabled.pl" 

# Custom settings below

server.max-fds = 2048
server.event-handler = "linux-sysepoll" 
server.max-keep-alive-idle = 2
#fastcgi.debug = 1

fastcgi.server = (
    ".pl" => ((
        "socket"   => "/var/run/lighttpd/perl-fcgi.socket",
        "bin-path" => "/usr/local/lib/cgi-bin/perl-dispatcher.fcgi",
        "check-local"     => "disable",
        "max-procs"       => 10,
    )),
)