Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 5744000 bytes) in /var/www/wp-includes/class-wpdb.php on line 2315

Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 5744000 bytes) in /var/www/wp-includes/class-wpdb.php on line 2315