Fatal error/home/stirling/public_html/wp-includes/class-wpdb.php2315

Fatal error/home/stirling/public_html/wp-includes/class-wpdb.php2315
: Allowed memory size of 268435456 bytes exhausted (tried to allocate 52495432 bytes) in on line : Allowed memory size of 268435456 bytes exhausted (tried to allocate 52495432 bytes) in on line