Why aren’t my feeds updating (Fatal error: Allowed Memory Size)

Issue: When manually updating feeds from the Manage Feeds page, the message appears: Fatal error: Allowed memory size of xyz bytes exhausted.
Reason: An application (Cart Product Feed) is loading more memory than what the PHP server can handle in one process.

Solution 1: Increase the PHP memory limit. Start by doubling the current value.
WordPress users. In the wp-config.php file, find or add the following:
define(‘WP_MEMORY_LIMIT’, ‘256M’);
Note: increasing this limit only works if your host allows it