Oracle 23ai 变化之—-默认数据文件变为bigfile

oracle把23c变为23ai，引入了很多新特性,今天下载了free版本的虚拟机登录进去第一感觉就是system,sysaux,undo等文件以前版本默认的smallfile变为了bigfile

SQL> select BANNER_FULL from v$version;

BANNER_FULL
----------------------------------------------------------------------------------
Oracle Database 23ai Free Release 23.0.0.0.0 - Develop, Learn, and Run for Free
Version 23.4.0.24.05

SQL> show pdbs;

    CON_ID CON_NAME                       OPEN MODE  RESTRICTED
---------- ------------------------------ ---------- ----------
         2 PDB$SEED                       READ ONLY  NO
         3 FREEPDB1                       READ WRITE NO

SQL> select con_id,ts#,name,bigfile from v$tablespace order by 1,2;

    CON_ID        TS# NAME                           BIG
---------- ---------- ------------------------------ ---
         1          0 SYSTEM                         YES
         1          1 SYSAUX                         YES
         1          3 TEMP                           NO
         1          4 USERS                          YES
         1          5 UNDOTBS2                       YES
         2          0 SYSTEM                         YES
         2          1 SYSAUX                         YES
         2          2 UNDOTBS1                       YES
         2          3 TEMP                           NO
         3          0 SYSTEM                         YES
         3          1 SYSAUX                         YES
         3          2 UNDOTBS1                       YES
         3          3 TEMP                           NO
         3          6 USERS                          NO

14 rows selected.

SQL> select con_id,file#,ts#,rfile#,name from v$datafile;

    CON_ID      FILE#        TS#     RFILE# NAME
---------- ---------- ---------- ---------- ------------------------------------------------------
         1          1          0       1024 /opt/oracle/oradata/FREE/system01.dbf
         2          2          0       1024 /opt/oracle/oradata/FREE/pdbseed/system01.dbf
         1          3          1       1024 /opt/oracle/oradata/FREE/sysaux01.dbf
         2          4          1       1024 /opt/oracle/oradata/FREE/pdbseed/sysaux01.dbf
         1          7          4       1024 /opt/oracle/oradata/FREE/users01.dbf
         2          9          2       1024 /opt/oracle/oradata/FREE/pdbseed/undotbs01.dbf
         3         12          0       1024 /opt/oracle/oradata/FREE/FREEPDB1/system01.dbf
         3         13          1       1024 /opt/oracle/oradata/FREE/FREEPDB1/sysaux01.dbf
         3         14          2       1024 /opt/oracle/oradata/FREE/FREEPDB1/undotbs01.dbf
         3         15          6         15 /opt/oracle/oradata/FREE/FREEPDB1/users01.dbf
         1         16          5       1024 /opt/oracle/oradata/FREE/undotbs2.dbf

11 rows selected.