Devel::NYTProf::ApacheUser Contributed Perl DocumentDevel::NYTProf::Apache(3p)



NAME
       Devel::NYTProf::Apache - Profile mod_perl applications with
       Devel::NYTProf

SYNOPSIS
         # in your Apache config file with mod_perl installed
         PerlPassEnv NYTPROF
         PerlModule Devel::NYTProf::Apache

       If you're using virtual hosts with "PerlOptions" that include either
       "+Parent" or "+Clone" then see "VIRTUAL HOSTS" below.

DESCRIPTION
       This module allows mod_perl applications to be profiled using
       "Devel::NYTProf".

       If the NYTPROF environment variable isn't set at the time
       Devel::NYTProf::Apache is loaded then Devel::NYTProf::Apache will issue
       a warning and default it to:

         file=/tmp/nytprof.$$.out

       The file actually created by NTProf will also have the process id
       appended to it because the "addpid" option is enabled by default.

       See "ENVIRONMENT VARIABLES" in Devel::NYTProf for more details on the
       settings effected by this environment variable.  Try using
       "PerlPassEnv" so you can set the NYTPROF environment variable
       externally.

       Each profiled mod_perl process will need to have terminated before you
       can successfully read the profile data file. The simplest approach is
       to start the httpd, make some requests (e.g., 100 of the same request),
       then stop it and process the profile data.

       Alternatively you could send a TERM signal to the httpd worker process
       to terminate that one process. The parent httpd process will start up
       another one for you ready for more profiling.

   Example httpd.conf
       It's often a good idea to use just one child process when profiling,
       which you can do by setting the "MaxClients" to 1 in httpd.conf.

       Using an "IfDefine" blocks lets you leave the profile configuration in
       place and enable it whenever it's needed by adding "-D NYTPROF" to the
       httpd startup command line.

         <IfDefine NYTPROF>
             MaxClients 1
             PerlModule Devel::NYTProf::Apache
         </IfDefine>

VIRTUAL HOSTS
       If your httpd configuration includes virtual hosts with "PerlOptions"
       that include either "+Parent" or "+Clone" then mod_perl2 will create a
       new perl interpreter to handle requests for that virtual host.  This
       causes some issues for profiling.

       If "Devel::NYTProf::Apache" is loaded in the top-level configuration
       then activity in any virtual hosts that use their own perl interpreter
       won't be profiled. Normal virtual hosts will be profiled just fine.

       You can profile a single virtual host that uses its own perl
       interpreter by loading "Devel::NYTProf::Apache" inside the
       configuration for that virtual host. In this case do not use
       "PerlModule" directive. You need to use a "Perl" directive instead,
       like this:

           <VirtualHost *:1234>
               ...
               <Perl> use Devel::NYTProf::Apache; </Perl>
               ...
           </VirtualHost>

LIMITATIONS
       Profiling mod_perl on Windows is not supported because NYTProf
       currently doesn't support threads.

SEE ALSO
       Devel::NYTProf

AUTHOR
       Adam Kaplan, "<akaplan at nytimes.com>" Tim Bunce,
       <http://www.tim.bunce.name> and <http://blog.timbunce.org> Steve
       Peters, "<steve at fisharerojo.org>"

COPYRIGHT AND LICENSE
         Copyright (C) 2008 by Adam Kaplan and The New York Times Company.
         Copyright (C) 2008 by Steve Peters.
         Copyright (C) 2008 by Tim Bunce.

       This library is free software; you can redistribute it and/or modify it
       under the same terms as Perl itself, either Perl version 5.8.8 or, at
       your option, any later version of Perl 5 you may have available.



perl v5.12.2                      2010-06-10        Devel::NYTProf::Apache(3p)
