Question

it is really unintuitive to me why after flush() the memory get increased instead of decreased? I cannot find anything useful in the documentation. I am flushing every 50 loop iterations and after each flush memory usage is being increased by 1MB. 100 flushing uses 100MB ! What am I missing here? I have seen on doctrine’s website example with clear(), but it if I use it I got an exception that one of my object does not have cascade persist set. Could anyone explain me what is done behind the scenes and what should I do to properly unset all doctrine’s objects?

Answer 1

The problem is, that the entity manager handles all objects. You should reset it if you dont need the objects in ram after each X iterations. Try this out:

// get the entity manager and save objects and flush
$em = $this->get('doctrine')->getEntityManager();
...
$em->flush();

// then reset the entity manager
$this->get('doctrine')->resetEntityManager();