Spike: solr:worker:run crashes and fills the queue infinitely

Steps to reproduce

• Use an account with a lot of content (see comment)

• Queue a solr-worker message

• Run php app/console solr:worker:run -e prod

• Result:
  PHP Fatal error: Allowed memory size of 1048576000 bytes exhausted (tried to allocate 32 bytes) in /home/integrated/vendor/doctrine/mongodb-odm/lib/Doctrine/ODM/MongoDB/PersistentCollection/AbstractPersistentCollectionFactory.php on line 46