[drraw-users] Performance of the cgi-script on Apache

[Andy Mayhew]

Christoph,
In your original post, you showed an Apache status with four different 
requests being made from the 53.250.190.18 client, including the 
/server-status and two /cgi-bin/perf/show.cgi requests.

A question that I have, is what is happening on the client side?  Many 
browsers limit the number of HTTP connections that they will make 
simultaneously to the same host to 2.  So, if you were testing with the 
same browser, on the same client, attempting to open the same (or 
similar request) in multiple browser windows to the same host, your 
response would look slow because the browser was limiting queuing the 
queries.  So the bottleneck is not the server, but rather the client.

You should be able to test this out by either making the multiple 
simultaneous requests from different browsers on the same client or just 
use multiple client hosts.

--Andy Mayhew

Baumann, Christoph wrote:
> Hi Fabien
> 
> This I can't beleave. Ist this true ? As I have a apache2 with prefork
> mpm
> Perhaps I can optimice in a way that the Dashboards are handled
> simultaneous.
> 
> Who can give me some hints?
> 
> Christoph
> 
> 
> 
> # ps -ef | grep http
> 
>     root   392     1   0   Apr 12 ?           0:35
> /usr/apache2/bin/httpd -k start
> webservd 13321   392   0 10:55:59 ?           0:00
> /usr/apache2/bin/httpd -k start
> webservd  8747   392   0 10:25:42 ?           0:00
> /usr/apache2/bin/httpd -k start
> webservd 13322   392   0 10:55:59 ?           0:00
> /usr/apache2/bin/httpd -k start
> webservd  8748   392   0 10:25:42 ?           0:00
> /usr/apache2/bin/httpd -k start
> webservd 13225   392   0 10:55:58 ?           0:00
> /usr/apache2/bin/httpd -k start
> webservd 17311   392   0 10:40:53 ?           0:00
> /usr/apache2/bin/httpd -k start
> 
> 
> 
> # ./apachectl -l
> Compiled in modules:
>   core.c
>   prefork.c
>   http_core.c
>   mod_so.c
> 
> 
> /etc/apache2/httpd.conf
> 
> # prefork MPM
> # StartServers: number of server processes to start
> # MinSpareServers: minimum number of server processes which are kept
> spare
> # MaxSpareServers: maximum number of server processes which are kept
> spare
> # MaxClients: maximum number of server processes allowed to start
> # MaxRequestsPerChild: maximum number of requests a server process
> serves
> <IfModule prefork.c>
> StartServers         5
> MinSpareServers      5
> MaxSpareServers     10
> MaxClients         150
> MaxRequestsPerChild  0
> </IfModule>
> 
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