Which should be tuned first when doing a performance tuning exercise for an Oracle Database environment?

RMAN> CONNECT CATALOG rc12c/pass12c@catdbl2c 

RMAN> IMPORT CATALOG rc11/pwdcat11@ract11

Which two tasks are performed as part of the import?

How do you configure a CDB for local undo mode?

Pluggable databases (PDBs), pdb1 and pdb2. You are connected to pdb2 as a common

User with DBA privileges.

The statistics_level parameter is PDB modifiable.

As the user sys, execute the following command on pdb2:

SQL> ALTER SYSTEM SET STATISTICS_LEVEL=ALL SID='∗' SCOPE=SPFILE;

Which statement is true about the result of this command?

SOL > select pluggable_database,shares,parallel_server_limit

From dba_cdb_rsrc_plan_directive where plan=’MY_PLAN’

order by pluggable_database;

PLUGGARLE_DATARASE                    SHARES             PARALLEL_SERVER_LIMIT

ORA$$AUTOTASK                                                           100

ORA$$DEFAULT_PDB_DIRECTIVE            1                        0

PDB1                                                      2                      100

PDB2                                                      2                       25

PDB3                                                      1

SOL > select name,value from v$parameter

2, where name = ‘resource_manager_plan’;

NAME                                  VALUE

Resource_manager_plan       MY_PLAN

Which two are ture?