多选题Which three statements are true concerning the multitenant architecture?（）AEach pluggable database (PDB) has its own set of background processes.BA PDB can have a private temp tablespace.CPDBs can share the sysaux tablespace.DLog switches occur only at the multitenant container database (CDB) level.EDifferent PDBs can have different default block sizes.FPDBs share a common system tablespace.GInstance recovery is always performed at the CDB level.
多选题
Which three statements are true concerning the multitenant architecture?（）
A
Each pluggable database (PDB) has its own set of background processes.
B
A PDB can have a private temp tablespace.
C
PDBs can share the sysaux tablespace.
D
Log switches occur only at the multitenant container database (CDB) level.
E
Different PDBs can have different default block sizes.
F
PDBs share a common system tablespace.
G
Instance recovery is always performed at the CDB level.
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