543473 joomla php memory error

site is down [login to view URL] attached is [login to view URL] which shows the error jtablesession::Store Failed DB function failed with error number 145 Table './meet_jo/jos_session' is marked as crashed and should be repaired SQL=INSERT INTO `jos_session` ( `session_id`,`time`,`username`,`gid`,`guest`,`client_id` ) VALUES ( '77a43e88bec3ae923f41cf7ff80262b2','1325603506','','0','1','0' ) Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 16 bytes) in /home/meet/public_html/libraries/joomla/error/[login to view URL] on line 117