Hi All, Greetings. Background: 1 primary (10.3) with 1 logical standby (10.3) on solaris sparc 64 bit. 1) I would like to know the difference between TRANSACTION_CONSISTENCY parameter and PRESERVE_COMMIT_ORDER parameter in DBMS_LOGSTDBY.APPLY_SET. I searched for these parameters online and tried to understand but I cannot completely point out the differences. My Google search results on TRANSACTION_CONSISTENCY refer to 9.2 version while PRESERVE_COMMIT_ORDER refer to 10.1+ version. 2) Has TRANSACTION_CONSISTENCY been replaced by PRESERVE_COMMIT_ORDER? or is TRANSACTION_CONSISTENCY still valid? Please help. Thanks in advance.