Hi Wiz, What I have observed is : On issuing an big SQL command( on BACKUPS or CONTENTS table..), first the command does not finish. Secondly if I stop the session, it goes into a hung mode. It does not get killed even after issuing a number of 'cansel sess < sess. no>'. The problem is , it makes the system very slow. My environment: RS 6000 H-50 AIX 4.3.2 TSM 3.7.4.0 Any hint is welcome . Regards Mahesh