Rails MySQL Session Sweeper

1) Download the launchd GUI, Lingon, from: http://lingon.sourceforge.net/

2) Add hourly job:

$RAILS_APP_DIR/script/runner 'ActiveRecord::Base.connection.delete("DELETE FROM sessions WHERE updated_at < now() - INTERVAL 1 HOUR")'

3) My launchd task plist file (yours will vary):

        Label
        us.boygeni.mysql-session-sweeper
        LowPriorityIO
        
        ProgramArguments
        
                /users/defeated/Sites/rails_apps/boygenius/script/runner
                'ActiveRecord::Base.connection.delete("DELETE FROM sessions WHERE updated_at < now() - INTERVAL 1 HOUR")'
        
        RunAtLoad
        
        StartInterval
        3600