Doctrine ORM Memory issues - php

Question

The Problem:
While running a Daemon service that uses Doctrine from the Factory classes below there is a memory issue. When the Daemon Service starts it runs about 175MB. A day later it's about 250MB, one more day and it's at 400MB. I'm looking as to what is causing the increase in memory and how I could bring it down.
Things I've tried:
$em->clear(); // This kinda helps
$em->close(); // this causes issues
$em->getConnection()->getConfiguration()->setSQLLogger(null);
--env=prod should take care of setSQLLogger(null), correct?
Is there anything I should be doing to help with memory issues using Doctrine 2.x and Symfony 2.1.x?
Created a factory to handle connections
===================== START EMFactory =====================
<?php
namespace NS\Bundle\EMBundle;
use Doctrine\ORM\EntityManager;
class EMFactory
{
/**
* #var
*/
private $container;
/**
* #param $container
*/
public function __construct($container)
{
$this->container = $container;
}
/**
* #return EntityManager
*/
public function getBlahEntityManager()
{
return $this->getContainer()->get('doctrine.orm.blah_manager_entity_manager');
}
/**
* #return EntityManager
*/
public function getFooEntityManager()
{
return $this->getContainer()->get('doctrine.orm.foo_manager_entity_manager');
}
/**
* #return EntityManager
*/
public function getBarEntityManager()
{
return $this->getContainer()->get('doctrine.orm.bar_manager_entity_manager');
}
/**
* #return mixed
*/
public function getContainer()
{
return $this->container;
}
/**
* #param $container
* #return $this
*/
public function setContainer($container)
{
$this->container = $container;
return $this;
}
public function closeEntityManager(EntityManager $em)
{
try {
$em->clear(); // This kinda helps
//$em->close(); // this causes issues
//$em->getConnection()->getConfiguration()->setSQLLogger(null); // --env=prod should take care of this
} catch (\Exception $e) {
// exception here
}
}
}
===================== END EMFactory =====================
I use an Abstract Class that constructs the EMFactory
===================== Start Abstract Class =====================
/**
* #param \Symfony\Component\DependencyInjection\Container $container
*/
public function __construct(Container $container)
{
$this->container = $container;
$this->entityManagerFactory = new EMFactory($container);
}
===================== END Abstract Class =====================
Here is an example of how I'm using the EM, The class extends the Abstract class above
===================== START Working Example #1 =====================
// calling like this looks to be working as expected
$fooEM = $this->getEntityManagerFactory()->getFooEntityManager();
$barResults = $fooEM->getRepository('NS\Bundle\EMBundle\Entity\Bar')->findOneBy(array('id' => 1));
if (!is_object($barResults)) {
throw new \Exception("Bar is a non object.");
}
// some logic here ...
$this->getEntityManagerFactory()->closeEntityManager($fooEM);
===================== END Working Example #1 =====================
Here is another example of how I'm using the EM, The class extends the Abstract class above
===================== START Working Example #2 =====================
// calling from functions like this
$fooEM = $this->getEntityManagerFactory()->getFooEntityManager();
$dql = 'SELECT b.*
FROM NS\Bundle\EMBundle\Entity\Bar b
WHERE b.id = :id';
$query = $fooEM->createQuery($dql);
$query->setParameter('id', 1);
$barResults = $query->getResult();
$this->getEntityManagerFactory()->closeEntityManager($fooEM);
return $barResults;
===================== END Working Example #2 =====================
Here is another example of how I'm using the EM, The class extends the Abstract class above
===================== START Working Example #3 =====================
// calling from functions like this
$fooEM = $this->getEntityManagerFactory()->getFooEntityManager();
$barEntity = new Bar();
$barEntity->setId(1);
$barEntity->setComment('this is foo-ie');
$fooEM->persist($barEntity);
$fooEM->flush();
$this->getEntityManagerFactory()->closeEntityManager($fooEM);
unset($barEntity);
===================== END Working Example #3 =====================
These are just some basic examples but it's just the queries that get more complex.
Does anything stand out that say, Optimize me?

Answer 1

Your issue might come from your instanciations of your entity managers. If you have a specific set of them, you might rather use Symfony2 Dependency Injection instead of calling the container.
Each time you use your accessors, you'll instantiate a new Entity Manager, hence consume more memory (and as it's a daemon, you never truly release it). By using DI, you'll always have the same instance.
Your EMFFactory should then look like this:
<?php
namespace NS\Bundle\EMBundle;
use Doctrine\ORM\EntityManager;
class EMFactory
{
/**
* #var
*/
private $fooEm;
/**
* #var
*/
private $barEm;
/**
* #var
*/
private $blahEm;
/**
* #param $fooEm
* #param $barEm
* #param $blahEm
*/
public function __construct($fooEm, $barEm, $blahEm)
{
$this->fooEm = $fooEm;
$this->barEm = $barEm;
$this->blahEm = $blahEm;
}
/**
* #return EntityManager
*/
public function getBlahEntityManager()
{
return $this->blahEm;
}
/**
* #return EntityManager
*/
public function getFooEntityManager()
{
return $this->fooEm;
}
/**
* #return EntityManager
*/
public function getBarEntityManager()
{
return $this->barEm;
}
/**
* #return mixed
*/
public function getContainer()
{
return $this->container;
}
/**
* #param $container
* #return $this
*/
public function setContainer($container)
{
$this->container = $container;
return $this;
}
public function closeEntityManager(EntityManager $em)
{
try {
$em->clear(); // This kinda helps
//$em->close(); // this causes issues
//$em->getConnection()->getConfiguration()->setSQLLogger(null); // --env=prod should take care of this
} catch (\Exception $e) {
// exception here
}
}
}
Then, tweak your service definitions to give the various EMs to your config, and define your EMFactory as a service as well.

Answer 2

This solved the connection issue we were having.
Needed to close just the connection
public function closeEntityManager(EntityManager $em)
{
try {
$em->clear(); // This kinda helps
$em->getConnection()->close(); // this seems to work
} catch (\Exception $e) {
// exception here
}
}