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Special Forums UNIX and Linux Applications Infrastructure Monitoring Using Node-RED and MQTT to Monitor Server and Application Stats Post 303043726 by Neo on Wednesday 5th of February 2020 05:52:01 AM
Old 02-05-2020
Expanded the dashboard a bit, and found the time series data helpful in tracking down some nagging performance issues.

The time series charts in these screen shots illustrate two brief performance hits. Since these hits happen at the top of the hours, I looked carefully a the application scheduled tasks and found a number of "clean up" tasks which were not an issue with the DB was small, but with a large DB these "clean up" hourly scheduled tasks can slow the site down.

So, I moved around five clean-up tasks to Saturday and Sunday, since moving these batch jobs to the weekend will not effect the application very much, but does improve performance quite a bit.

Using Node-RED and MQTT to Monitor Server and Application Stats-screen-shot-2020-02-05-54437-pmjpg


Using Node-RED and MQTT to Monitor Server and Application Stats-screen-shot-2020-02-05-54333-pmjpg
 

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Mojo::Server(3pm)					User Contributed Perl Documentation					 Mojo::Server(3pm)

NAME
Mojo::Server - HTTP server base class SYNOPSIS
use Mojo::Base 'Mojo::Server'; sub run { my $self = shift; # Get a transaction my $tx = $self->build_tx; # Emit "request" event $self->emit(request => $tx); } DESCRIPTION
Mojo::Server is an abstract HTTP server base class. EVENTS
Mojo::Server can emit the following events. "request" $server->on(request => sub { my ($server, $tx) = @_; ... }); Emitted when a request is ready and needs to be handled. $server->unsubscribe('request'); $server->on(request => sub { my ($server, $tx) = @_; $tx->res->code(200); $tx->res->headers->content_type('text/plain'); $tx->res->body('Hello World!'); $tx->resume; }); ATTRIBUTES
Mojo::Server implements the following attributes. "app" my $app = $server->app; $server = $server->app(MojoSubclass->new); Application this server handles, defaults to a Mojo::HelloWorld object. "app_class" my $app_class = $server->app_class; $server = $server->app_class('MojoSubclass'); Class of the application this server handles, defaults to the value of the "MOJO_APP" environment variable or Mojo::HelloWorld. METHODS
Mojo::Server inherits all methods from Mojo::EventEmitter and implements the following new ones. "new" my $server = Mojo::Server->new; Construct a new Mojo::Server object and subscribe to "request" event with default request handling. "build_tx" my $tx = $server->build_tx; Let application build a transaction. "load_app" my $app = $server->load_app('./myapp.pl'); Load application from script. say Mojo::Server->new->load_app('./myapp.pl')->home; "run" $server->run; Run server. Meant to be overloaded in a subclass. SEE ALSO
Mojolicious, Mojolicious::Guides, <http://mojolicio.us>. perl v5.14.2 2012-09-05 Mojo::Server(3pm)
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