[Catalyst] Finding the memory leaks in a Cat app

[Tomas Doran]

On 13 Aug 2010, at 12:11, Octavian Rasnita wrote:
> I have a Catalyst application that occupies 180 MB of RAM if it uses  
> the internal development server. It occupies more than 1 GB of RAM  
> if it uses Apache/mod_perl.

I don't believe that. But never mind..

> Even though it is very much, it would be OK if the memory usage  
> wouldn't increase on each request.
> <snip>
> [debug] Circular reference detected:
> .------------------------------------------------------------------------.
> | $ctx->{stash}->{__InstancePerContext_158098900}- 
> >{c}                   |
> | $ctx->{stash}->{__InstancePerContext_158258668}- 
> >{c}                   |
> | $ctx->{stash}->{__InstancePerContext_158322332}- 
> >{c}                   |
> '------------------------------------------------------------------------'

Whatever component in your application is using InstancePerContext is  
leaking.

Are you using it directly yourself, and if not, what components from  
CPAN are you using, at what versions?

(Or, look into a debug dump screen, find the things in the stash which  
are in an __InstancePerContext key - these are the candidates to blame)

Cheers
t0m