Hi We have this setup db_writer_processes = 4 disk_asynch_io = false I have doubts whether i can set the below on.... please suggest advantages and disadvantages of below setting.......on HP-UX disk_asynch_io = TRUE tape_asynch_io = TRUE am unclear mainly about disk_asynch_io,db_writer_processes,DBWR_IO_SLAVES Any help would be appreciated. Regards, Edwin.K --------------------------------- Shape Yahoo! in your own image. Join our Network Research Panel today!