httpdtap man page

httpdtap — Utility for querying httpd using SystemTap scripts.

Synopsis

httpdtap <command> [[stap_argument], ...] [[arg], ...]

httpdtap help <command>

httpdtap --version

Description

The purpose of the httpdtap utility is to query running httpd process to get various debugging or performance related data from it.

Examples of such data could be the list of files accessed during a request, time needed to dispatch a request, the list of requests slower than N milliseconds or the list of requests sent from particular IP address.

Thanks to SystemTap the performance penalty is very low and therefore the httpdtap can be used even on production systems.

Actions

Without any argument passed to httpdtap, httpdtap shows the help message and the list of available commands.

<command> [[stap_argument], ...] [[arg], ...]

Executes httpdtap command. List of available commands can be obtained by executing httpdtap without any arguments. stap_argument is optional and is the argument passed to stap command. These arguments are listed in stap(8) manpage. Usage of argument arg depends on particular commands which is going to be executed and is documented in help <command> output.

help <command>

Shows help message related to particular httpdtap command.

--version

Shows httpdtap version.

Authors

· Jan Kaluza <jkaluza@redhat.com>

See Also

stap(8)

For more information, see the httpdtap homepage at http://github.com/hanzz/httpdtap/

Info

September 10, 2013 Version 0.2 httpdtap Manual