What would be the reason for a registration page to hangs after submit?

Question

For some reason whenever i try to submit a new user registration (on a fresh drupal 7 install), the data is correctly sent to the Back end but the page doesn't seem to redirect to the intended location (by default the home page)but instead seems to endlessly submit.

I am pretty sure this come from my testing server as it does it even on a fresh drupal install. Is there anything that would come to your minds on what could be the cause of this problem ? We are using ubuntu server with all latest software updates.

Answer 1

Drupal uses a lot of files so make sure the real_path_cache in php.ini is increased dramatically.

max_execution_time to around 120

realpath_cache_size to 512K, 1M or even 2M.

max_input_time to around 120.

Answer 2

Check memory_limit for your Drupal instance.

On settings.php add this line

ini_set('memory_limit', '128M');