Langue: en

Version: 2009-01-28 (fedora - 05/07/09)

Section: 3 (Bibliothèques de fonctions)


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


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


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:


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


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




Adam Kaplan, "<akaplan at>" Tim Bunce, <> and <> Steve Peters, "<steve at>"
   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.