Re: [otrs] Re: some performance related questions

Hello, In the otrs/bin directory you can find a perl script, otrs.chechModules. Run it from the command line and this will show you if you have all you modules installed. Peter 2008/1/3, kerneljack :

Further from my last post, I just read http://faq.otrs.org/otrs/public.pl?Action=PublicFAQ&CategoryID=3&ItemID=200, and following the advice from the page, it seems I don't have mod_perl enabled. I get the following output:

------------------------------------------------------------------- Error: Module 'Kernel::Modules::foo' not found! Comment: Please contact your admin Bug Report: Traceback: ERROR: OTRS-CGI-10 Perl: 5.8.5 OS: linux Time: Thu Jan 3 15:50:14 2008

Message: Module 'Kernel::Modules::foo' not found!

Traceback (23477): Module: Kernel::System::Web::InterfaceAgent::Run (v1.23) Line: 185 Module: /opt/otrs/bin/cgi-bin/index.pl (v1.81) Line: 47 -------------------------------------------------------------------

I do have a 'mod_perl-1.99_16-4.5' RPM installed on the system. How can I enable it?

On Jan 3, 2008 3:44 PM, kerneljack wrote:

...

Hi, I just wanted to clarify/discuss some questions I have about the performance of OTRS on a machine I have it installed on. I don't know a lot about optimizing web servers / mod_perl for performance thus I am hoping you can give me some advice. I have already read some of the 'Performance Tuning' and have implemented some of the changes.

The machine I am using is a very old Sun Cobalt Raq XTR server with only 256 MB of RAM and CentOS 4 on it. There are 2 hard drives in it running a software RAID 1 mirror. I would like to upgrade the RAM but I don't think it will be possible.

I am not sure if the machine is running mod_perl or not, although I think it is. In /etc/httpd/conf.d/perl.conf, I have the following:

------------------------------------------------------------------ LoadModule perl_module modules/mod_perl.so

#Alias /perl /var/www/perl # # SetHandler perl-script # PerlResponseHandler ModPerl::Registry # PerlOptions +ParseHeaders # Options +ExecCGI #</Directory> ------------------------------------------------------------------

Do I need to enable the lines from Alias onwards, and then put something in /var/www/perl? Is there some other way to surely verify this? In /var/log/httpd/error_log I *DO NOT* see any reference to mod_perl when the server is stopped/started.

httpd.conf is configured with the following:

------------------------------------------------------------------ <IfModule prefork.c> StartServers 8 MinSpareServers 10 MaxSpareServers 25 ServerLimit 256 MaxClients 124 MaxRequestsPerChild 4000 </IfModule> ------------------------------------------------------------------

When I do a 'ps' listing, I can see 10 httpd processes.

Whenever I make a request, such as clicking on the QueueView icon or Email Ticket, I see a single "index.pl" process that consumes 98-99% of cpu until the page has loaded and then it exits. I also see a MySQL process that takes up only about 2% cpu time and only when the 'index.pl' is running. I do not see any 'perl' or 'httpd' processes starting/stopping when I load a page.

I have read some of the performance tuning section and have added the 'TicketIndexModule' and 'TicketStorageModule' lines. Under Database, I have done the 'optimize {ticket, ticket_history, article}. As far as I can tell, mod_perl is enabled because of the 'LoadModule' line and I see no 'perl' processes so I am assuming that it is working. Please let me know if I am wrong in thinking this.

Given this current configuration, I was wondering it there is any way to make this faster? It is quite slow at the moment. Clicking on Email Ticket or QueueView is not as instantaneous as in the demo on the OTRS website. It takes upto 3-4 seconds to load. This doesn't sound too bad, but with 20-30 clients accessing it all the time, the problem is going to get worse isn't it? More memory might help, but I don't think I will be able to obtain it. Would optimising mod_perl help in any way? Or maybe reducing the number of httpd processes to reduce memory usage?

Any help much appreciated, Thanks.

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