Hi Philip,
I had a similar issue, few of the heavy reports which is having more no of Input controls and variable caused WIPS down frequently.
hence we trigeered the below query in the Audit DB.this will show the required details.
which user,report, data, no of rows, which server has executed..it will show all the detail.
selectA.Event_id, B.server_NAME,c.object_type_name, start_time, duration_ms, user_name,folder_id,object_name,event_type_id,object_folder_path,
(selectto_char(event_detail_value)fromads_event_detailwhere event_id=A.Event_idand event_detail_type_id=63) rowA,
(selectto_char(event_detail_value)fromads_event_detailwhere event_id=A.Event_idand event_detail_type_id=17) sizeA,
(selectto_char(event_detail_value)fromads_event_detailwhere event_id=A.Event_idand event_detail_type_id=14andrownum<2) universe
fromads_eventA,ADS_SERVER_NAME_STR B,ADS_OBJECT_TYPE_STR C
wherea.event_type_id='1002'
ANDA.SERVER_ID=B.SERVER_IDAND B.LANGUAGE='EN'
ANDa.object_type_id=C.object_type_idand C.Language='EN'