Hello all,
I'm looking to migrate from my current mod_fastcgi configuration to
mod_fcgid. Since my FastCGI server (the application I write) is a big
large and unwieldy, currently I use mod_fastcgi to spawn five instances
of my server application, which in turn spawns about 400 threads
internally which handle incoming requests in a multi-threaded fashion.
This works okay with mod_fastcgi - this is a busy httpd servicing an
average of around 75 requests per second. An odd part of this server is
that many of the requests may take up to twenty seconds to complete due
to back-end processing with third party APIs, the processing time is not
within my control (just mentioning this in case it matters).
At any rate, this all works pretty well with mod_fastcgi (although
mod_fastcgi is a bit buggy). My problem is that in migrating to
mod_fcgid (supposedly, I shouldn't need to make any changes to my
FastCGI application - just configure mod_fcgid and use that instead of
mod_fastcgi), it seems mod_fcgid isn't aware of the fact that my server
is multi-threaded and is able to handle more than one request. Thus, 75
requests per second on five servers queues up pretty fast, and if I can
get it to eventually answer a request it'll take around five minutes to
do so.
There are no errors in the error log - I don't think there would be,
because this is related to volume that mod_fcgid doesn't think my
application can handle, and everything just fails silently. Here's my
mod_fcgid configuration, from my httpd.conf:
<IfModule fcgid_module>
AddHandler fcgid-script .fcgi
FcgidBusyScanInterval 10
FcgidBusyTimeout 300
FcgidConnectTimeout 30
FcgidErrorScanInterval 1
FcgidIdleScanInterval 5
FcgidIdleTimeout 30
FcgidIOTimeout 300
FcgidIPCDir /var/run/fcgid.sock
FcgidMaxProcesses 500
FcgidMinProcessesPerClass 4
FcgidMaxProcessesPerClass 50
# FastCGI processes will be terminated after handling this many
requests - we don't want this. 0 disables.
FcgidMaxRequestsPerProcess 0
FcgidZombieScanInterval 1
</IfModule>
I've combed the mod_fcgid documentation over a few times, and it doesn't
mention anything about multi-threaded FastCGI servers. I'd appreciate
any insight that anybody could offer on this.
Thanks!
Brett Gmoser
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