I think the documentation in this case is misleading, when trying to do the operation I got : SQL> alter session set container=pdb1; SQL> alter system set log_archive_dest='/tmp' container=current; alter system set log_archive_dest='/tmp' container=current * ERROR at line 1: ORA-65040: operation not allowed from within a pluggable database -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Amihay Gonen Sent: Monday, September 23, 2013 2:56 PM To: oracle-l@xxxxxxxxxxxxx Subject: PDBs and oracle parameter I've just going over the parameters which can be changed at PDB level (select * From parameter where ispdb_modifiable='TRUE';) ISPDB_MODIFIABLE VARCHAR2(5) Indicates whether the parameter can be modified inside a PDB (TRUE) or not (FALSE). In a non-CDB, the value of this column is NULL. I wonder if this field means the every PDB can have different value, or I can change it from PDB but it affects the complete instance. For example "log_archive_dest_1" is part of the list , but it don't make sense to different values (since the redo files are part of the instance level ) ? Regards, Amihay Gonen Oracle Domain Export -- //www.freelists.org/webpage/oracle-l -- //www.freelists.org/webpage/oracle-l