On Sun, 18 Jun 2006, Ruediger Pluem wrote:
On 06/18/2006 02:49 PM, Mathieu CARBONNEAUX wrote:
i think is very usefull to have this in production environment... to debug
probleme without interupting production... in only up the log level with
reload...
with strace you must restart apache with strace...and for desactivating it you
must restart... in some production environement is not acceptable...
Why that? You can attach strace to running processes, provided that you have
appropriate permissions on this process. So
you might need root access for this.
Of course I admit that the strace / ltrace output is generic and a more
specific output by logging inside the hooks
could provide better information.
If you have a Solaris 10 host handy, you can get at this information with
the DTrace pid provider. It allows you to enable probes dynamically on
user-level functions, and is an invaluable tool for debugging stuff in
production.
- Ryan
--
UNIX Administrator
http://daemons.net/~matty
