Sometimes if you are having a performance problem you might want to know what SQL statements are being run - you can trawl through these to work out what is causing the problem. The v$sql table can be used to view all queries that are being run.
WHERE UPPER(sql_text) LIKE '%SELECT%'
AND module = 'aspnet_wp.exe'
AND UPPER(sql_text) NOT LIKE '%FROM V$SQL%'
ORDER BY last_load_time DESC, module