How do count the number of queries executed

<?php

use Phalcon\Events\Event,
       Phalcon\Db\Adapter;

class DbEventListener extends \Phalcon\Mvc\User\Component {

    public function beforeQuery(Event $event, Adapter $connection) {
        $this->dbProfiler->startProfile($connection->getSQLStatement(), $connection->getSQLVariables(), $connection->getSQLBindTypes());
    }

    public function afterQuery(Event $event, Adapter $connection) {
        $this->dbProfiler->stopProfile();
    }

}

<?php

# Attach EM to database adapter 
$di['db']->setEventsManager($di['eventsManager']);

# Create a database profiler
$di['dbProfiler'] = new \Phalcon\Db\Profiler;

# Attach a listener to log each DB query
$di['eventsManager']->attach('db', new DbEventListener);

# Get total statements
$nQueries = $di['dbProfiler']->getNumberTotalStatements();

You can also get the queries as raw SQL, bind types etc