Generating apache log reports

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dbi::profiledumper::apache

DBI::ProfileDumper::Apache(3)				User Contributed Perl Documentation			     DBI::ProfileDumper::Apache(3)

NAME

       DBI::ProfileDumper::Apache - capture DBI profiling data from Apache/mod_perl

SYNOPSIS

       Add this line to your httpd.conf:

	 PerlSetEnv DBI_PROFILE DBI::ProfileDumper::Apache

       Then restart your server.  Access the code you wish to test using a web browser, then shutdown your server.  This will create a set of
       dbi.prof.* files in your Apache log directory.  Get a profiling report with dbiprof:

	 dbiprof /usr/local/apache/logs/dbi.prof.*

       When you're ready to perform another profiling run, delete the old files

	 rm /usr/local/apache/logs/dbi.prof.*

       and start again.

DESCRIPTION

       This module interfaces DBI::ProfileDumper to Apache/mod_perl.  Using this module you can collect profiling data from mod_perl applications.
       It works by creating a DBI::ProfileDumper data file for each Apache process.  These files are created in your Apache log directory.  You
       can then use dbiprof to analyze the profile files.

USAGE

       LOADING THE MODULE

       The easiest way to use this module is just to set the DBI_PROFILE environment variable in your httpd.conf:

	 PerlSetEnv DBI_PROFILE DBI::ProfileDumper::Apache

       If you want to use one of DBI::Profile's other Path settings, you can use a string like:

	 PerlSetEnv DBI_PROFILE 2/DBI::ProfileDumper::Apache

       It's also possible to use this module by setting the Profile attribute of any DBI handle:

	 $dbh->{Profile} = "DBI::ProfileDumper::Apache";

       See DBI::ProfileDumper for more possibilities.

       GATHERING PROFILE DATA

       Once you have the module loaded, use your application as you normally would.  Stop the webserver when your tests are complete.  Profile
       data files will be produced when Apache exits and you'll see something like this in your error_log:

	 DBI::ProfileDumper::Apache writing to /usr/local/apache/logs/dbi.prof.2619

       Now you can use dbiprof to examine the data:

	 dbiprof /usr/local/apache/logs/dbi.prof.*

       By passing dbiprof a list of all generated files, dbiprof will automatically merge them into one result set.  You can also pass dbiprof
       sorting and querying options, see dbiprof for details.

       CLEANING UP

       Once you've made some code changes, you're ready to start again.  First, delete the old profile data files:

	 rm /usr/local/apache/logs/dbi.prof.*

       Then restart your server and get back to work.

MEMORY USAGE

       DBI::Profile can use a lot of memory for very active applications.  It collects profiling data in memory for each distinct query your
       application runs.  You can avoid this problem with a call like this:

	 $dbh->{Profile}->flush_to_disk() if $dbh->{Profile};

       Calling "flush_to_disk()" will clear out the profile data and write it to disk.	Put this someplace where it will run on every request,
       like a CleanupHandler, and your memory troubles should go away.	Well, at least the ones caused by DBI::Profile anyway.

AUTHOR

       Sam Tregar <sam@tregar.com>

COPYRIGHT AND LICENSE

       Copyright (C) 2002 Sam Tregar

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl 5 itself.

perl v5.8.0							    2002-11-29					     DBI::ProfileDumper::Apache(3)

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