To increasing the WordPress Memory Limit, please edit your wp-config.php file and enter something like:
define('WP_MEMORY_LIMIT', '512M');
For more detail, please check http://codex.wordpress.org/Editing_wp-config.php#Increasing_memory_allocated_to_PHP
Notice: this setting may NOT work if your web hosting does not allow for increasing the PHP memory limit.
In that case, please contact your web hosting to increase the PHP memory limit.
