Apache2::Status - Embedded interpreter status information
<Location /perl-status> SetHandler modperl PerlResponseHandler Apache2::Status </Location>
The Apache2::Status module provides some information about the status of the Perl interpreter embedded in the server.
Apache2::Status
Configure like so:
Notice that under the "modperl" core handler the Environment menu option will show only the environment under that handler. To see the environment seen by handlers running under the "perl-script" core handler, configure Apache2::Status as:
"modperl"
"perl-script"
<Location /perl-status> SetHandler perl-script PerlResponseHandler Apache2::Status </Location>
Other modules can "plugin" a menu item like so:
require Apache2::Module; Apache2::Status->menu_item( 'DBI' => "DBI connections", #item for Apache::DBI module sub { my($r, $q) = @_; #request and CGI objects my(@strings); push @strings, "blobs of html"; return \@strings; #return an array ref } ) if Apache2::Module::loaded('Apache2::Status');
WARNING: Apache2::Status must be loaded before these modules via the PerlModule or PerlRequire directives (or from startup.pl).
PerlModule
PerlRequire
StatusOptionsAll
This single directive will enable all of the options described below.
PerlSetVar StatusOptionsAll On
StatusDumper
When browsing symbol tables, the values of arrays, hashes and scalars can be viewed via Data::Dumper if this configuration variable is set to On:
Data::Dumper
On
PerlSetVar StatusDumper On
StatusPeek
With this option On and the Apache::Peek module installed, functions and variables can be viewed ala Devel::Peek style:
Apache::Peek
Devel::Peek
PerlSetVar StatusPeek On
StatusLexInfo
With this option On and the B::LexInfo module installed, subroutine lexical variable information can be viewed.
B::LexInfo
PerlSetVar StatusLexInfo On
StatusDeparse
With this option On subroutines can be "deparsed".
PerlSetVar StatusDeparse On
Options can be passed to B::Deparse::new like so:
B::Deparse::new
PerlSetVar StatusDeparseOptions "-p -sC"
See the B::Deparse manpage for details.
B::Deparse
StatusTerse
With this option On, text-based op tree graphs of subroutines can be displayed, thanks to B::Terse.
B::Terse
PerlSetVar StatusTerse On
StatusTerseSize
With this option On and the B::TerseSize module installed, text-based op tree graphs of subroutines and their size can be displayed. See the B::TerseSize docs for more info.
B::TerseSize
PerlSetVar StatusTerseSize On
StatusTerseSizeMainSummary
With this option On and the B::TerseSize module installed, a "Memory Usage" will be added to the Apache2::Status main menu. This option is disabled by default, as it can be rather cpu intensive to summarize memory usage for the entire server. It is strongly suggested that this option only be used with a development server running in -X mode, as the results will be cached.
-X
PerlSetVar StatusTerseSizeMainSummary On
StatusGraph
When StatusDumper is enabled, another link "OP Tree Graph" will be present with the dump if this configuration variable is set to On:
PerlSetVar StatusGraph
This requires the B module (part of the Perl compiler kit) and B::Graph (version 0.03 or higher) module to be installed along with the dot program.
B::Graph
dot
Dot is part of the graph visualization toolkit from AT&T: http://www.graphviz.org/.
WARNING: Some graphs may produce very large images, some graphs may produce no image if B::Graph's output is incorrect.
Dot
Location of the dot program for StatusGraph, if other than /usr/bin or /usr/local/bin
GraphDir
Directory where StatusGraph should write it's temporary image files. Default is $ServerRoot/logs/b_graphs.
$ServerRoot/logs/b_graphs
The Devel::Symdump module, version 2.00 or higher.
Devel::Symdump
2.00
Other optional functionality requirements: B::Deparse - 0.59, B::Fathom - 0.05, B::Graph - 0.03.
B::Fathom
mod_perl 2.0 and its core modules are copyrighted under The Apache Software License, Version 2.0.
perl(1), Apache(3), Devel::Symdump(3), Data::Dumper(3), B(3), B::Graph(3), mod_perl 2.0 documentation.
Doug MacEachern with contributions from Stas Bekman
To install mod_perl2, copy and paste the appropriate command in to your terminal.
cpanm
cpanm mod_perl2
CPAN shell
perl -MCPAN -e shell install mod_perl2
For more information on module installation, please visit the detailed CPAN module installation guide.