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Apache::Status - Embedded interpreter status information
<Location /perl-status> SetHandler perl-script PerlHandler Apache::Status </Location>
The Apache::Status module provides some information about the status of the Perl interpreter embedded in the server.
Configure like so:
<Location /perl-status> SetHandler perl-script PerlHandler Apache::Status </Location>
Other modules can ``plugin'' a menu item like so:
Apache::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 Apache->module("Apache::Status"); #only if Apache::Status is loaded
WARNING: Apache::Status must be loaded before these modules via the PerlModule or PerlRequire directives.
This single directive will enable all of the options described below.
PerlSetVar StatusOptionsAll On
When browsing symbol tables, the values of arrays, hashes ans calars can be viewed via Data::Dumper if this configuration variable is set to On:
PerlSetVar StatusDumper On
With this option On and the Apache::Peek module installed, functions and variables can be viewed ala Devel::Peek style:
PerlSetVar StatusPeek On
With this option On and the B::LexInfo module installed, subroutine lexical variable information can be viewed.
PerlSetVar StatusLexInfo On
With this option On and B::Deparse version 0.59 or higher (included in Perl 5.005_59+), subroutines can be ``deparsed''.
PerlSetVar StatusDeparse On
Options can be passed to B::Deparse::new like so:
PerlSetVar StatusDeparseOptions "-p -sC"
See the B::Deparse manpage for details.
With this option On, text-based op tree graphs of subroutines can be displayed, thanks to B::Terse.
PerlSetVar StatusTerse On
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.
PerlSetVar StatusTerseSize On
With this option On and the B::TerseSize module installed, a ``Memory Usage'' will be added to the Apache::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.
PerlSetVar StatusTerseSizeMainSummary On
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.
Dot is part of the graph visualization toolkit from AT&T:
http://www.research.att.com/sw/tools/graphviz/).
WARNING: Some graphs may produce very large images, some graphs may produce no image if B::Graph's output is incorrect.
Location of the dot program for StatusGraph, if other than /usr/bin or /usr/local/bin
Directory where StatusGraph should write it's temporary image files. Default is $ServerRoot/logs/b_graphs
The Devel::Symdump module, version 2.00 or higher.
perl(1), Apache(3), Devel::Symdump(3), Data::Dumper(3), B(3), B::Graph(3)
Doug MacEachern