04-10-2010
Memory leaks is indeed a bad thing and can be trick to find BUT if you used a tool like collectl it would certainly make things a lot easier. Similar in function to SAR but with much more comprehensive data collection and reporting. Since leaks can often be slow, you'd probably want to postprocess the data it collects rather than run it in real-time, so just turn it on and let it do its thing for awhile.
Then you can play back the data and examine the top users of memory by process! In fact if you do see your process using up real memory and that memory happens to be slabs, you can actually look at the top slab being consumed over time too! While the latter view is not by process, it can provide get hints to the problems since the slab names tend to tell you why that memory is being used.
-mark
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LEARN ABOUT DEBIAN
catalystx::leakchecker
CatalystX::LeakChecker(3pm) User Contributed Perl Documentation CatalystX::LeakChecker(3pm)
NAME
CatalystX::LeakChecker - Debug memory leaks in Catalyst applications
VERSION
version 0.06
SYNOPSIS
package MyApp;
use namespace::autoclean;
extends 'Catalyst';
with 'CatalystX::LeakChecker';
__PACKAGE__->setup;
DESCRIPTION
It's easy to create memory leaks in Catalyst applications and often they're hard to find. This module tries to help you finding them by
automatically checking for common causes of leaks.
This module is intended for debugging only. I suggest to not enable it in a production environment.
METHODS
found_leaks(@leaks)
If any leaks were found, this method is called at the end of each request. A list of leaks is passed to it. It logs a debug message like
this:
[debug] Circular reference detected:
+------------------------------------------------------+-----------------+
| $ctx->{stash}->{ctx} |
'------------------------------------------------------+-----------------'
It's also able to find leaks in code references. A debug message for that might look like this:
[debug] Circular reference detected:
+------------------------------------------------------+-----------------+
| $a = $ctx->{stash}->{leak_closure}; |
| code reference $a deparses to: sub { |
| package TestApp::Controller::Affe; |
| use warnings; |
| use strict 'refs'; |
| $ctx->response->body('from leaky closure'); |
| }; |
| ${ $ctx } |
'------------------------------------------------------+-----------------'
Override this method if you want leaks to be reported differently.
AUTHORS
Florian Ragwitz <rafl@debian.org> Tomas Doran <bobtfish@bobtfish.net>
COPYRIGHT AND LICENSE
This software is copyright (c) 2010 by Florian Ragwitz.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.10.1 2010-03-26 CatalystX::LeakChecker(3pm)