How to incrase WP Memory Limit
Solution for Fatal error: Allowed memory size of XXXXXXXX bytes exhausted.
Edit your wp-config.php file and enter something like:
You can read more about this here.
If you have access to your PHP.ini file, change the lines in PHP.ini
memory_limit = 256M ; Maximum amount of memory a script may consume (256MB)
ini_set('max_execution_time', 300); //300 seconds = 5 minutes
Incase, if you don’t have access to PHP.ini try adding this to an .htaccess file:
php_value memory_limit 256M
php_value max_execution_time 300
If this still doesn’t work or if you’re not confident about making these changes, you would need to talk to your hosting company.