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Devel-NYTProf-2.10_96
River stage two • 35 direct dependents • 45 total dependents
189 ++
/ Devel::NYTProf::Apache

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

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

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>

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.