Nginx Can't handeled More Perl CGI concurrent Request

Hello

We are using Fastcgi module in nginx with perl.

We are trying to send 200 concurrent perl cgi request, but after
increase
the 250 concurrent request to specific script, We are getting below
error in
nginx log file.

[error] 23526#0: *3291 connect() to unix:/var/run/fcgiwrap.socket failed
(11: Resource temporarily unavailable) while connecting to upstream,
client:
::1, server: _, request: “POST /cgi-bin/example/example-xml.cgi
HTTP/1.1”,
upstream: “fastcgi://unix:/var/run/fcgiwrap.socket:”, host: “localhost”

In my nginx file content following configuration.

location /cgi-bin/ {

gzip off;
# Set the root to /usr/lib (inside this location this means that we 

are
# giving access to the files under /usr/lib/cgi-bin)
root /usr/lib/;
# Fastcgi socket
fastcgi_pass unix:/var/run/fcgiwrap.socket;
# fastcgi_pass 127.0.0.1:8999;
# Fastcgi parameters, include the standard ones
include /etc/nginx/fastcgi_params;
# Adjust non standard parameters (SCRIPT_FILENAME)
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
}

The Same things Apache can handle 500+ concurrent request without any
extra
configuration.

Can any one suggest me how to achieve this OR Is there any mistake in my
configuration to make it working with more concurrent request ?

If you require more log feel free to ask.

Posted at Nginx Forum:
https://forum.nginx.org/read.php?2,267885,267885#msg-267885

Hello!

On Mon, Jun 27, 2016 at 01:36:50AM -0400, bhavik wrote:

We are using Fastcgi module in nginx with perl.

We are trying to send 200 concurrent perl cgi request, but after increase
the 250 concurrent request to specific script, We are getting below error in
nginx log file.

[error] 23526#0: *3291 connect() to unix:/var/run/fcgiwrap.socket failed
(11: Resource temporarily unavailable) while connecting to upstream, client:
::1, server: _, request: “POST /cgi-bin/example/example-xml.cgi HTTP/1.1”,
upstream: “fastcgi://unix:/var/run/fcgiwrap.socket:”, host: “localhost”

The message indicate that listen queue of the backend socket is
overflowed, your backend can’t cope with load. Make sure to tune
your backend properly - number of processes and socket liste queue
are most important things to consider.

Note well that if you are in fact using fcgiwrap as the socket
name suggests, it’s a wrong approach for a loaded server.
Consider converting your scripts to use FastCGI directly instead.

[…]


Maxim D.
http://nginx.org/

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