Oracle 12.2 ORA-65010: maximum number of pluggable databases created

在创建PDB时报错：
[code]SQL> create pluggable database pdb4 admin user pdbadmin identified by oracle;
create pluggable database pdb4 admin user pdbadmin identified by oracle
*
ERROR at line 1:
ORA-65010: maximum number of pluggable databases created[/code]
在12.2引入max_pdbs参数，控制最大pdb数量，最大值4098：
[code]SQL> show parameter max_pd

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
max_pdbs integer 3
SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB1 READ WRITE NO
4 PDB2 READ WRITE NO
5 PDB3 READ WRITE NO
SQL> alter system set max_pdbs=10;

System altered.

SQL> create pluggable database pdb4 admin user pdbadmin identified by oracle;

Pluggable database created.

SQL> show pdbs

CON_ID CON_NAME OPEN MODE RESTRICTED
---------- ------------------------------ ---------- ----------
2 PDB$SEED READ ONLY NO
3 PDB1 READ WRITE NO
4 PDB2 READ WRITE NO
5 PDB3 READ WRITE NO
6 PDB4 MOUNTED
SQL>[/code]
官方文档：
http://docs.oracle.com/database/122/REFRN/MAX_PDBS.htm#GUID-55526BAC-DCB2-4C76-9ACF-1E3D2047E267