Hello,
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.
Even though it is very much, it would be OK if the memory usage wouldn't
increase on each request.
I have started Apache with the -X parameter to use a single process and I have
also changed to "1" all the settings for Prefork MPM, but when using the ab
utility, the memory usage increases and it creates swap.
The memory it occupies also increases if I use the internal development server.
So I am pretty sure my app has some memory leaks and I tried to use
CatalystX::LeakChecker for finding them.
It gave the following results, but I don't know how to interpret them and find
the piece of code that create leaks:
[debug] Circular reference detected:
.------------------------------------------------------------------------.
| $ctx->{stash}->{__InstancePerContext_158098900}->{c} |
| $ctx->{stash}->{__InstancePerContext_158258668}->{c} |
| $ctx->{stash}->{__InstancePerContext_158322332}->{c} |
'------------------------------------------------------------------------'
I've also tried to use C::P::LeakTracker by adding it to the list of plugins
and creating the Leaks.pm controller:
package BRK::Controller::Leaks;
use Moose;
use namespace::autoclean;
use parent qw(Catalyst::Controller::LeakTracker);
sub index :Path :Args(0) {
my ( $self, $c ) = @_;
$c->forward("list_requests"); # redirect to request listing view
}
__PACKAGE__->meta->make_immutable;
1;
But when I access it, it gives the error below.
Please give me some hints for using these 2 modules, or recommend another way
of finding the code that create memory leaks.
Thank you.
I am using Perl 5.10.1 and Catalyst 5.80025.
Here is the error generated when I access /leaks:
Couldn't load class (MyApp) because: Couldn't instantiate component
"MyApp::Controller::Leaks", "Inconsistent hierarchy during C3 merge of class
'MyApp::Controller::Leaks': merging failed on parent 'Moose::Object' at
e:/usr/lib/mro.pm line 24."Compilation failed in require at
e:/usr/site/lib/Class/MOP.pm line 114.
at e:/usr/site/lib/Class/MOP.pm line 120
Class::MOP::__ANON__('Couldn\'t instantiate component
"MyApp::Controller::Leaks", "In...') called at e:/usr/site/lib/Try/Tiny.pm line
98
Try::Tiny::try('CODE(0x2062e54)', 'Try::Tiny::Catch=REF(0x2ae97d4)') called at
e:/usr/site/lib/Class/MOP.pm line 125
Class::MOP::load_first_existing_class('MyApp') called at
e:/usr/site/lib/Class/MOP.pm line 137
Class::MOP::load_class('MyApp') called at
e:/usr/site/lib/Catalyst/ScriptRole.pm line 61
Catalyst::ScriptRole::_run_application('Catalyst::Script::Server=HASH(0x2b16f9c)')
called at e:/usr/site/lib/Catalyst/Script/Server.pm line 181
Catalyst::Script::Server::run('Catalyst::Script::Server=HASH(0x2b16f9c)')
called at e:/usr/site/lib/Class/MOP/Method/Wrapped.pm line 48
Class::MOP::Method::Wrapped::__ANON__('Catalyst::Script::Server=HASH(0x2b16f9c)')
called at e:/usr/site/lib/Class/MOP/Method/Wrapped.pm line 89
Catalyst::Script::Server::run('Catalyst::Script::Server=HASH(0x2b16f9c)')
called at e:/usr/site/lib/Catalyst/ScriptRunner.pm line 20
Catalyst::ScriptRunner::run('Catalyst::ScriptRunner', 'MyApp', 'Server')
called at script/myapp_server.pl line 8
--
Octavian
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