Could not obtain user/online information

DEBUG MODE

SQL Error : 5 Out of memory (Needed 1677720 bytes)

SELECT u.username, u.user_id, u.user_allow_viewonline, u.user_level, s.session_logged_in, s.session_ip FROM fj_users u, fj_sessions s WHERE u.user_id = s.session_user_id AND s.session_time >= 1282928340 AND s.session_page = 9 ORDER BY u.username ASC, s.session_ip ASC

Line : 187
File : page_header.php