Increase the WordPress Memory Limit

To increasing the WordPress Memory Limit, please edit your wp-config.php file and enter something like:

define('WP_MEMORY_LIMIT', '256M');

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 host does not allow for increasing the PHP memory limit. In that case, please contact your host to increase the PHP memory limit.