Question

Fatal error: Allowed memory size of 134217728 bytes exhausted.

There are a few cases where I need to create 10’s of thousands of results, but obviously this is causing huge memory issues. Are there any ways of reducing the memory on large query sets?

Answer 1

It depends on how you will use the results:

• if you don’t need the result as object but array will suffice you
  can change hydration mode:
  ->setHydrationMode(Doctrine::HYDRATE_ARRAY) can be used to retrieve
  data in a multidimensional array (other hydration mode can be found
  on doctrine documentation)
• if you need objects as result (for example in a foreach cycle) remember to free them after use:
  $myobject->free(); /* if using php 5.2 also unset($myobject) */
  look also at doctrine docs on performance improving
• also disabling debug bar helps a lot on big doctrine collections: sfConfig::set('sf_debug', false);