John Goulah
and 1 contributors

NAME

Catalyst::Plugin::AutoRestart - Catalyst plugin to restart server processes when specified memory threshold is reached

SYNOPSIS

use Catalyst qw/AutoRestart/;

 __PACKAGE__->config->{Plugin::AutoRestart} = {
        active => '1',
        check_each => '20',
        max_bits => 576716800,
        min_handled_requests => '150',
        size_field => 'size', # or any other field supported by
                              # Proc::ProcessTable::Process
        restart => 'exit', # alternative is kill for a more graceful restart
 }

 <Plugin::AutoRestart>
    active   1
    check_each   20
    max_bits  576716800
    min_handled_requests   150
    restart exit
 </Plugin::AutoRestart>

DESCRIPTION

Catalyst plugin to force the application to restart server processes when they reach a configurable memory threshold. Memory checks are performed every 'N' requests. This is intended as a band-aid to deal with problems like memory leaks; it's here to buy you time to find and solve the underlying issues.

CONFIGURATION

active

This is used to turn the plugin on and off

check_each

This is the number of requests to wait between checks

min_handled_requests

Minimum application requests before process size check starts occurring. This is to prevent your application processes from exiting immediately in case your application is bigger than your max_bits limit.

The default is 500 requests

max_bits

This is the size virtual memory can grow to before triggering a restart

The default is 524288000 bits (500 mb)

size_field

Which size field to measure. Defaults to size. Other values are anything that Proc::ProcessTable::Process has an accessor for, which depends on your OS. Most people will want size (virtual memory size) or rss (resident set size)

SEE ALSO

For trying to solve memory leaks see Devel::Leak::Object

EXTENDED METHODS

The following methods are extended from the main Catalyst application class.

setup

Create sane defaults

handle_request

Count each handled request and when a threshold is met, restart.

_debug_process_table

Send to the log the full running process table and return the size of the process

AUTHORS

 John Napiorkowski <john.napiorkowski@takkle.com>
 John Goulah       <jgoulah@cpan.org>

COPYRIGHT

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.