Arun >I am querying the v$session to get the sql_address of >some sessions who are generating high redo.but before >even going there i am seeing this weird output from >v$session where there is no value in sql_address and >henceforth i cannot know what sql these sessions are >running. According to the fine manual SQL_ADDRESS is "Used with SQL_HASH_VALUE to identify the SQL statement that is currently being executed". Since those sessions are not executing a SQL statement, but waiting on the client, this is the expected behavior. HTH Chris New Features Oracle Database 10g Release 2 seminars @ www.trivadis.com Italiano: Lugano (24-Nov) Français: Genève (17-Nov) Deutsch: Hamburg (13-Oct), München (20-Oct), Basel (25-Oct), Frankfurt (27-Oct), Zürich (29-Nov), Bern (8-Nov), Düsseldorf (23-Nov), Stuttgart (13-Dec) -- //www.freelists.org/webpage/oracle-l