1.查看进入pdb查看v$datafile视图，确认文件路径
2.asmcmd进入其路径du即可。
[oracle@rac1:/home/oracle]$ sqlplus / as sysdba
SQL*Plus: Release 19.0.0.0.0 - Production on Sat Dec 20 19:17:28 2025
Version 19.9.0.0.0
Copyright (c) 1982, 2020, Oracle. All rights reserved.
Connected to:
Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.9.0.0.0
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB READ WRITE NO
SQL> alter pluggable database all close immediate instances=all;
Pluggable database altered.
SQL> show pdbs;
CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB MOUNTED
SQL> alter session set container=pdb;
Session altered.
SQL> select name from v$datafile;
NAME
--------------------------------------------------------------------------------
+DATA/JYC/42B133224FC259CDE0634CCFA8C0B908/DATAFILE/system.276.1216241607
+DATA/JYC/42B133224FC259CDE0634CCFA8C0B908/DATAFILE/sysaux.277.1216241607
+DATA/JYC/42B133224FC259CDE0634CCFA8C0B908/DATAFILE/undotbs1.275.1216241607
+DATA/JYC/42B133224FC259CDE0634CCFA8C0B908/DATAFILE/undo_2.279.1216241665
+DATA/JYC/42B133224FC259CDE0634CCFA8C0B908/DATAFILE/users.280.1216241667
SQL> exit
Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production
Version 19.9.0.0.0
[oracle@rac1:/home/oracle]$ exit
logout
[root@rac1 ~]# su - grid
Last login: Sat Dec 20 19:12:06 CST 2025
[grid@rac1:/home/grid]$ asmcmd
ASMCMD> cd +DATA/JYC/
ASMCMD> ls
42B103686F313291E0634CCFA8C01473/
42B133224FC259CDE0634CCFA8C0B908/
86B637B62FE07A65E053F706E80A27CA/
CONTROLFILE/
DATAFILE/
ONLINELOG/
PARAMETERFILE/
PASSWORD/
TEMPFILE/
ASMCMD> du42B133224FC259CDE0634CCFA8C0B908
Used_MB Mirror_used_MB
1268 1268